Cat food with hair beautifying effect and preparation method thereof

Abstract

A meat core is formed by baking young pigeon meat and chicken, functional components such as deep sea fish oil, linseed oil and the like are embedded in a wall material containing cranberry powder, chicory roots, lactoferrin and zinc to form a functional coating to wrap the meat core, and a vacuum freeze drying technology is combined, so that the activity of the functional components is effectively protected, and the release performance is improved; zinc ions are supplemented, so that the antibacterial property and the stability are enhanced, and the hair health is promoted. The outermost layer of the cat food adopts the chicken liver powder, the valerian extract and chitosan to form a barrier oil film, oxidation is remarkably delayed, the shelf life is prolonged, meanwhile, the chicken liver powder and the valerian extract are used for improving the food calling effect and the emotion relieving effect, and the palatability is further improved. Unification of functional activity protection, texture optimization and product stability is realized.

Description

Technical Field

[0001] This invention belongs to the field of pet food technology, specifically relating to a cat food with coat-enhancing effects and its preparation method. Background Technology

[0002] With the development of the pet industry, consumers' functional demands for cat food are increasing, with "beautiful coat" becoming one of the core needs. Healthy fur in cats relies on the synergistic effect of high-quality protein, unsaturated fatty acids, vitamins, and trace elements. However, existing cat food products have significant shortcomings in terms of processing and formulation: First, single-processing methods have limitations. While pure freeze-dried cat food can retain some heat-sensitive nutrients, it tends to be hard, easily absorbs moisture, and often sacrifices nutritional balance in pursuit of the "freeze-dried form." Purely baked cat food, while crispy, is prone to losing key fur-beautifying ingredients (such as Omega-3 and biotin) due to high-temperature baking (usually above 160℃), resulting in limited coat-beautifying effects. Second, most existing coat-beautifying cat foods only add fish oil or lecithin, failing to form a "synergistic nutritional system." Furthermore, improper processing (such as high-temperature mixing and easy peeling off of the coating) leads to low utilization of effective ingredients, resulting in short-lasting coat improvement effects after consumption. Furthermore, some products excessively add oily ingredients to enhance coat health, resulting in greasy cat food and diarrhea in cats; or reduce roughage to ensure palatability, causing intestinal metabolic problems and indirectly affecting coat health. Current technologies struggle to simultaneously achieve the three goals of "preserving nutritional activity through processing," "synergistic effects of coat-enhancing ingredients," and "palatability and nutritional balance," necessitating an innovative solution that combines processing technology with formulation. Summary of the Invention

[0003] The technical problem to be solved: To address the issues that conventional production processes often lead to the loss of heat-sensitive nutrients and may increase the burden on pets' gastrointestinal tract with long-term consumption, as well as the difficulty in balancing crispy texture and nutrient release efficiency, this invention uses freeze-drying technology to encapsulate deep-sea fish oil, flaxseed oil, and coat-enhancing nutrients in dietary fiber wall materials such as chicory root and lactoferrin, preparing stable functional ingredient microcapsules. These microcapsules are then mixed with meat powder as a functional coating, layered around a meat core made from dried squab and chicken, and then fixed by vacuum freeze-drying, producing a double-layer textured cat food. This precisely solves the problems of stability and release of coat-enhancing functional ingredients, while achieving ultimate palatability through the ingenious combination of ingredients and processes.

[0004] Technical solution: A method for preparing cat food with coat-enhancing effects, comprising the following steps: S1. Mince pigeon meat, chicken meat, and chicken liver into a paste, add water and stir evenly, cold press into shape, and then dry at low temperature to obtain the inner core; S2. Lactoferrin and oyster powder are dispersed in water, compound vitamins are added and stirred, and then added to tapioca starch solution and homogenized to obtain aqueous phase; S3. Deep-sea fish oil, krill oil, and astaxanthin are mixed and ultrasonically used as the oil phase. Under high-speed shearing, the oil phase is slowly added to the aqueous phase to form a primary emulsion, and the emulsion is obtained by high-pressure homogenization. S4. Egg yolk powder, carrot powder, and chicory root powder are mixed with water to form a mixture. A compound bacterial suspension containing glycerol is added and stirred slowly. The mixture is then freeze-dried to obtain microcapsules. S5. Microcapsules are added to the emulsion. Maltodextrin and pumpkin powder are mixed evenly and added to the emulsion. After homogenization, the functional coating powder is freeze-dried and mixed with minced chicken and water to obtain a slurry. S6. The inner core is inserted into the mold and then filled and covered with slurry. After cold pressing and freezing drying, cat food pellets are obtained. S7. Chitosan-acetic acid solution was added dropwise to a mixed aqueous solution of zinc methionine and valerian extract and stirred until homogeneous. Chicken liver powder and tapioca starch were added and homogenized at high speed to obtain a mixed solution. Then, the solution was added to flaxseed oil and homogenized by microfluidic jet to obtain an outer emulsion. S8. The outer layer of emulsion is evenly sprayed onto the surface of the cat food pellets, left to stand, and then packaged to obtain cat food with coat-enhancing effects.

[0005] Furthermore, in step S1, the ratio of pigeon meat, chicken meat, chicken liver and water is (25-30):(20-30):(3-5):(10-15); the low-temperature drying temperature is below 65℃, and the hardness of the inner core is controlled at 800-1500g / cm².

[0006] Furthermore, in step S2, the mass ratio of lactoferrin, oyster powder, compound vitamins, tapioca starch, and water is (5-8):(10-12):(0.2-0.3):(20-40):(50-80); the compound vitamins are biotin, pantothenic acid, and niacin in a mass ratio of (2-3):(35-40):(130-150); the stirring speed is 100-300 rpm, and the time is 1-2 hours; the homogenization speed is 1000-2000 rpm, and the homogenization time is 5-8 minutes.

[0007] Furthermore, in step S3, the mass ratio of deep-sea fish oil, krill oil, and astaxanthin is (20-30):(10-20):(0.1-0.3); the ultrasonic power is 200-300W, and the ultrasonic time is 10-15min; the high-speed shearing speed is 8000-10000 rpm, and the time is 5-8min; the mass ratio of oil phase to water phase is (1-2):(5-9); and the pressure of high-pressure homogenization is 20-30MPa.

[0008] Furthermore, in step S4, the mass ratio of egg yolk powder, carrot powder, chicory root powder, and water is (1-2):(1-1.5):1:(3-5); the concentration of the compound bacterial suspension is 10. 9CFU / g; the compound bacterial suspension consists of Lactobacillus plantarum and Saccharomyces cerevisiae with a colony count of 1:(1-2); the glycerol content is 10-20 wt.%, and the mass ratio of the mixed solution to the compound bacterial suspension is (1-2):1.

[0009] Furthermore, in step S5, the mass ratio of microcapsules, emulsion, maltodextrin and pumpkin powder is (10-20):(50-90):(1-3):(2-3); the homogenization speed is 1000-2000 rpm and the homogenization time is 5-8 min; the mass ratio of functional coating powder, chicken paste and water is (2-5):(2-5):(1-3).

[0010] Furthermore, in step S6, the ratio of the inner core to the slurry is (7-8):(2-3).

[0011] Further, in step S7, the concentration of acetic acid solution in the chitosan-acetic acid solution is 1-2 wt.%, and the content of chitosan is 1-2 wt.%; the solute concentration in the mixed aqueous solution of zinc methionine and valerian extract is 0.2-0.5 wt.%; the mass ratio of chitosan-acetic acid solution droplets, mixed aqueous solution of zinc methionine and valerian extract, chicken liver powder, and cassava starch is (8-12):(10-15):(1-3):(1-3); the high-speed homogenization speed is 5000-8000 rpm, and the homogenization time is 5-8 min; the mass ratio of the mixture to flaxseed oil is (8-9):(1-2); and the pressure of microjet homogenization is 15-20 MPa.

[0012] Furthermore, in step S8, the amount of outer emulsion sprayed is 1-2 wt.% of the initial cat food pellets; the standing time is 10-15 min.

[0013] A cat food with coat-enhancing effects prepared by any of the above preparation methods.

[0014] Beneficial effects: 1. The final spray coating layer of this invention uses Pickering emulsion, which is more resistant to high temperatures and long-term storage. This means that the coat-enhancing effect remains consistent throughout the cat food's shelf life. This stable structure allows for slow digestion in the intestines, enabling nutrients such as Omega-3 to be absorbed and utilized more gently. Furthermore, the spray coating forms a thin and uniform coating on the surface, maximizing the protection of the cat food's original flavor and texture, making it more attractive to cats. It also prevents oils from completely penetrating into the cat food, making the functional oils on the surface easier for cats to lick and directly absorb during consumption.

[0015] 2. This invention further optimizes the formula, providing comprehensive nutrition. The product simultaneously provides prebiotics, high-quality protein, and functional ingredients, supporting digestive and immune system health while beautifying hair. It also internally supplements zinc ions, which promote healthy hair growth, increase density, and enhance shine by repairing the hair follicle epithelium and regulating sebum, starting from the fundamental health of hair follicle cells.

[0016] 3. This invention features a unique "double-layer texture" experience with exceptional palatability. The freeze-dried outer layer is light and crisp, while the baked inner core is crunchy and chewy. This dual texture, combined with the meaty aroma locked in by the freeze-drying process, greatly stimulates a cat's appetite. The chicken liver powder sprayed on the outer layer not only serves as a preservative but also acts as an appetite stimulant for cats. Valerian extract not only helps relieve stress and relax the cat while it eats but also has the potential to promote hair growth and improve coat quality.

[0017] 4. This invention significantly improves the stability of these active ingredients during processing and storage by encapsulating easily oxidized fish oil, astaxanthin, and fragile probiotics separately, preventing their inactivation and oxidative deterioration, and ensuring the effectiveness of the product's final coat-enhancing effect. Cranberry powder, chicory root, and lactoferrin are used as wall materials, which are themselves prebiotics and also have coat-enhancing auxiliary functions. Vacuum freeze-drying is employed to maximize the protection of the bioactivity of heat-sensitive functional ingredients at low temperatures.

[0018] 5. The outermost spray coating layer of this invention is a dense film formed by chitosan and other materials, which directly blocks air and moisture. This is the first line of defense against oxidation. Natural preservatives such as chicken liver powder, valerian extract, and chitosan have antibacterial and antioxidant properties, providing a second layer of protection against oxidation.

[0019] 6. This invention, through active encapsulation and targeted release technology, ensures the efficient utilization of prebiotics and coat-enhancing nutrients, and, in conjunction with the intrinsic regulation of zinc ions, achieves remarkable hair improvement effects; the double-layer texture brings a novel taste, and the natural palatability enhancers and mood-soothing ingredients work together to create impeccable palatability; it reflects the "refined" and "humanized" development trend of modern pet food. Attached Figure Description

[0020] Figure 1 The graph shows the rate of decrease in hair loss in pet cats after feeding them the sample cat food. Figure 2 A graph showing the hair growth length of the pet cats after feeding them the sample cat food; Figure 3 Images showing the effect of the pet cat's fur before and after feeding it the sample cat food from Example 1; Figure 4 Images showing the effect of the pet cat's fur before and after feeding it the sample cat food of Example 4; Figure 5 Images showing the effect of the pet cat's fur before and after feeding the sample cat food of Comparative Example 1. Figure 6 Images showing the effect of the pet cat's fur before and after feeding the sample cat food of Comparative Example 2; Figure 7 Images showing the effect of the pet cat's fur before and after feeding the sample cat food of Comparative Example 3; Figure 8 Images showing the effect of the pet cat's fur before and after feeding the sample cat food of Comparative Example 4; Figure 9 Images showing the effect of the pet cat's fur before and after feeding the sample cat food of control ratio 5; Figure 10 Images showing the effect of the pet cat's fur before and after feeding the sample cat food of control ratio 6. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. The following embodiments are illustrative of the present invention, but the present invention is not limited to the following embodiments: Example 1 A cat food with coat-enhancing effects and its preparation method, comprising the following steps: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0022] Example 2 A cat food with coat-enhancing effects and its preparation method, comprising the following steps: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5.200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 250g functional coating powder was mixed with 250g minced chicken and 120g water and stirred to obtain a slurry. The S61400g inner core is inserted into a "cubic" mold, filled and covered with 600g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0023] Example 3 A cat food with coat-enhancing effects and its preparation method, comprising the following steps: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3.100g deep-sea fish oil, 50g krill oil, and 0.5g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 110g of the oil phase was slowly added to 990g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0024] Example 4 A cat food with coat-enhancing effects and its preparation method, comprising the following steps: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.3g of zinc methionine and 0.15g of valerian extract were added to 99.2g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0025] Example 5 A cat food with coat-enhancing effects and its preparation method, comprising the following steps: S1. Mince 1000g of pigeon meat, 1200g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0026] Example 6 A cat food with coat-enhancing effects and its preparation method, comprising the following steps: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2.160g lactoferrin and 200g oyster powder were dispersed in 400g water, and 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0027] Example 7 A cat food with coat-enhancing effects and its preparation method, comprising the following steps: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5.100g microcapsules were added to 900 emulsion. 60g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0028] Comparative Example 1 The difference between this comparative example and Example 1 is that the freeze-drying process was not used to prepare the bilayer texture, as detailed below: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well to obtain paste 1; S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain slurry 2. S6.1600g of slurry 1 and 400g of slurry 2 are mixed and put into a "cubic" mold. After cold pressing, they are dried at a temperature below 65°C to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0029] Comparative Example 2 The difference between this comparative example and Example 1 is that the baking process is not used to prepare the bilayer texture, as detailed below: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well to obtain paste 1; S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain slurry 2. S6.1600g of slurry 1 and 400g of slurry 2 are mixed, put into a "cubic" mold, cold-pressed and then freeze-dried to obtain cat food pellets; S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0030] Comparative Example 3 The difference between this comparative example and Example 1 is that the outer emulsion does not contain zinc methionine and valerian extract, as detailed below: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 199g of 1wt.% acetic acid solution, and then 10g of chicken liver powder and 10g of tapioca starch were added. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure by micro-jet to obtain an outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0031] Comparative Example 4 The difference between this comparative example and Example 1 is that the deep-sea fish oil is not emulsified and is prepared as an emulsion, as detailed below: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain functional solution 1. S3. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S4.200g microcapsules, 100g deep-sea fish oil, 50g krill oil, 0.5g astaxanthin, 900g functional liquid 1, 20g maltodextrin and 40g pumpkin powder are mixed evenly and homogenized at 1000rpm for 5min. Then, 200g minced chicken is mixed in and stirred to obtain a slurry. The S5.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S6.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S7.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0032] Comparative Example 5 The difference between this comparative example and Example 1 is that no functional coating powder is prepared, as detailed below: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5.200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenizing at 1000rpm for 5min, 200g minced chicken was mixed and stirred to obtain a paste. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed and then freeze-dried to obtain cat food pellets. S7.1g of chitosan was dissolved in 99g of 1wt.% acetic acid solution. 0.2g of zinc methionine and 0.1g of valerian extract were added to 99.7g of water and stirred evenly. Then, 100g of chitosan-acetic acid solution was added dropwise, followed by 10g of chicken liver powder and 10g of tapioca starch. The mixture was homogenized at 5000pm for 8min to obtain a mixture. Then, 160g of the mixture was added to 20g of flaxseed oil and homogenized under 15MPa pressure using microfluidic jet to obtain the outer emulsion. S8.15g of outer emulsion is evenly sprayed onto the surface of 1500g of cat food pellets, left to stand for 10 minutes, and then packaged to obtain cat food with coat-enhancing effects.

[0033] Comparative Example 6 The difference between this comparative example and Example 1 is that no outer layer emulsion is sprayed, as detailed below: S1. Mince 1000g of pigeon meat, 800g of chicken meat, and 120g of chicken liver into a paste, add 400g of water and stir well. After cold pressing into a "cubic prism" shape, dry it at a temperature below 65℃ to obtain the inner core. The hardness of the inner core is 800-1500g / cm². S2. 100g lactoferrin and 200g oyster powder were dispersed in 400g water, 0.05g biotin, 1.0g pantothenic acid and 3.5g niacin were added and stirred at 100rpm for 1h. 400g tapioca starch was added to 600g aqueous solution and homogenized at 1000rpm for 5min to obtain the aqueous phase. S3. 200g deep-sea fish oil, 100g krill oil, and 1g astaxanthin were mixed and sonicated at 200W for 10 minutes to form the oil phase. Under high-speed shearing at 8000rpm, 250g of the oil phase was slowly added to 1250g of the aqueous phase to form the primary emulsion. The emulsion was obtained by high-pressure homogenization at 20MPa. S4. Mix 100g egg yolk powder, 100g carrot powder, and 100g chicory root powder with 300g water to form a liquid. The concentration is 2×10⁻⁶ for 270g. 9 CFU / g of Lactobacillus plantarum and Saccharomyces cerevisiae complex suspension was protected with 30g of glycerol. The mixture and complex suspension were mixed and stirred slowly, and then freeze-dried to obtain microcapsules. S5. 200g microcapsules were added to 1000 emulsion. 20g maltodextrin and 40g pumpkin powder were mixed evenly and added to the emulsion. After homogenization at 1000rpm for 5min, the mixture was freeze-dried to obtain functional coating powder. 200g functional coating powder was mixed with 200g minced chicken and 100g water and stirred to obtain a slurry. The S6.1600g inner core is inserted into a "cubic" mold, filled and covered with 400g of slurry, cold-pressed, and then freeze-dried to obtain cat food.

[0034] Indicator Test 1. Palatability assessment During the experiment, the weight, body size, and living environment of all cats remained consistent before and after the experiment. They were divided into groups of 18 cats each, and food was provided to the cats for free access daily. They were kept in the same environment for 28 days, and the average daily food intake of each cat was recorded. Ordinary cat food was used as a control, and the preferred choice rate and consumption rate of the experimental cat food were recorded.

[0035] The experimental results are shown in Table 1. The average daily food intake of the examples was over 200g. The first-choice rate (83-88%) and the feed intake rate (89-94%) of the example groups were 56-66% and 31-39% higher than those of the control group, respectively. Among them, Example 2 had the highest feed intake rate and the best palatability, which may be related to the increased proportion of outer pulp. The control group had the worst palatability, indicating that drying has a significant impact on the taste of cat food. Although the first-choice rate was not the lowest, the feed intake rate was below 60%.

[0036] Table 1 Results of cat food consumption

[0037] 2. Coat evaluation of a pet cat after 28 days of feeding The percentage reduction in shedding in pet cats after 28 days of feeding was assessed. Using the same pet comb, the cat was combed 30 cm along the spine starting from the neck. The same comb was used three times in a row. The hair from each combing was collected and weighed using an electronic balance. The rate of reduction in shedding was recorded, and the hair length was measured.

[0038] The rate of decrease in hair loss is as follows Figure 1 Both the examples and the comparative examples showed a decrease in hair loss, but the decrease rate in the examples was higher than 35%, while the decrease rates in the comparative examples were all below 30%, showing a significant difference. Comparative Example 1 showed the least decrease, indicating that drying severely damages the functional substances and affects the hair-beautifying effect. The results for hair growth length are as follows... Figure 2 The correlation between the rate of hair loss reduction and the rate of hair loss reduction indicates that the present invention can not only reduce hair loss in pet cats, but also promote hair growth.

[0039] 3. Sensory evaluation score of the pet cat's coat after 28 days of feeding. (1) Coat gloss is based on natural light as the light source and is categorized as dull, dark, average, and bright. (1) Glossiness is divided into five levels, with a score of 1 to 5 points; (2) Softness is judged by the consistency of the appearance direction of the hair and the feel, and is divided into five levels: knotted, slightly knotted, rough and split, normal, and soft, with a score of 1 to 5 points; (3) Skin condition is divided into five levels: extremely dry and cracked with dandruff, dry and cracked with dandruff, normal and elastic, extremely moist and shiny, and moist and shiny and elastic, with a score of 1 to 5 points; (4) Sensory evaluation of feel is based on the force of the hair on the palm when stroking the hair, and is divided into five levels: very weak, weak, normal, strong, and very strong, with a score of 1 to 5 points; (5) Hair color is divided into 5 levels: color saturation is 5 points, and the score decreases according to the saturation.

[0040] The results are shown in Table 2. Example 4 significantly outperformed the comparative group in all five sensory evaluation indicators of hair, achieving a high overall score. The key reason lies in the complete nutritional system, the synergistic effect of Omega-3 fatty acids (deep-sea fish oil + krill oil), B vitamins (biotin, pantothenic acid), and minerals (zinc methionine); emulsification treatment increased the absorption rate of fat-soluble nutrients by 40%, and microencapsulation technology improved the survival rate of probiotics. The comparative groups, lacking key components or processes, generally exhibited problems such as dull hair color, dry skin, and rough texture. Comparative Group 2, due to its drying process, suffered from the worst hair condition because the functional substances could not maintain their activity at high temperatures. Secondly, Comparative Group 5 did not prepare functional coating powder, lacking protection and thus limiting the effectiveness of the functional substances.

[0041] Table 2 Sensory evaluation scores of cats' fur after feeding

[0042] Figure 3-10 The images show the changes in the fur of pet cats before and after feeding them different cat foods. As can be seen from the images, the fur of the pet cats changed after feeding, becoming softer and shinier. The changes were particularly significant in Examples 1 and 4, and the other comparative examples also showed obvious effects.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the spirit and technical essence of the present invention. Therefore, any simple modifications, equivalent substitutions, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the technical solutions of the present invention, shall still fall within the scope of protection of the present invention.

Claims

1. A method for preparing cat food having a hair beautifying effect, characterized by, The method comprises the following steps: S1. Grind the milk pigeon meat, chicken meat and chicken liver into a paste, mix with water, cold-press into a shape and dry at low temperature to obtain an inner core; S2. Disperse lactoferrin and oyster powder in water, add a compound vitamin, stir, then add to a cassava starch solution, and homogenize to obtain a water phase; S3. Mix deep sea fish oil, phosphorus shrimp oil and astaxanthin by ultrasonic, as an oil phase, slowly add the oil phase to the water phase under high speed shearing to form an initial emulsion, and high-pressure homogenize to obtain an emulsion; S4. Mix egg yolk powder, carrot powder and chichory root powder with water to obtain a mixed solution, slowly stir in a compound bacteria suspension containing glycerol, and freeze dry to obtain microcapsules; S5. Add the microcapsules to the emulsion, mix malt dextrin and pumpkin powder uniformly, add to the emulsion, homogenize, and freeze dry to obtain a functional coating powder, mix the chicken paste with water to obtain a slurry; S6. Fill the slurry into the mold to coat the inner core, cold-press into a shape, and freeze dry to obtain cat food initial particles; S7. Add a chitosan-acetic acid solution dropwise to a mixed water solution of zinc methionine and valerian extract, stir uniformly, add chicken liver powder and cassava starch, high-speed homogenize to obtain a mixed solution, then add to flaxseed oil, and micro-jet homogenize to obtain an outer layer emulsion; S8. Uniformly spray the outer layer emulsion on the surface of the cat food initial particles, stand, and package to obtain cat food with hair beautifying effect.

2. The method of preparing a cat food having a beauty effect according to claim 1, characterized by: The ratio of the milk pigeon meat, chicken meat, chicken liver and water in step S1 is (25-30):(20-30):(3-5):(10-15); the temperature for low-temperature drying is lower than 65℃, and the hardness of the inner core is controlled at 800-1500 g / cm².

3. The method of preparing cat food having a beauty effect according to claim 1, characterized by: The mass ratio of lactoferrin, oyster powder, compound vitamin, cassava starch and water in step S2 is (5-8):(10-12):(0.2-0.3):(20-40):(50-80); the compound vitamin is biotin, pantothenic acid and nicotinic acid with a mass ratio of (2-3):(35-40):(130-150); the stirring speed is 100-300 rpm, and the stirring time is 1-2 h; the homogenization speed is 1000-2000 rpm, and the homogenization time is 5-8 min.

4. The method of preparing cat food having a beauty effect according to claim 1, characterized by: The mass ratio of deep sea fish oil, phosphorus shrimp oil and astaxanthin in step S3 is (20-30):(10-20):(0.1-0.3); the ultrasonic power is 200-300 W, the ultrasonic time is 10-15 min; the high speed shearing speed is 8000-10000 rpm, and the time is 5-8 min; the mass of the oil phase and the water phase is (1-2):(5-9); and the high pressure homogenization pressure is 20-30 MPa.

5. The method of preparing cat food having a beauty effect according to claim 1, characterized by: The mass ratio of the egg yolk powder, carrot powder, chicory root powder and water in the step S4 is (1-2):(1-1.5):1:(3-5); the concentration of the composite bacteria suspension is 10 9 CFU / g; the composite bacteria suspension is Lactobacillus plantarum and Saccharomyces cerevisiae with a bacteria colony number ratio of 1:(1-2); the content of glycerol is 10-20 wt.%; and the mass ratio of the mixed solution to the composite bacteria suspension is (1-2):

1.

6. The method of preparing cat food having a beauty effect according to claim 1, wherein the cat food is prepared by adding 0.01 to 0.5 parts by weight of the composition of claim 1 to 100 parts by weight of a cat food base. The mass ratio of the microcapsules, the emulsion, malt dextrin and pumpkin powder in step S5 is (10-20):(50-90):(1-3):(2-3); the homogenization speed is 1000-2000 rpm, and the homogenization time is 5-8 min; the mass ratio of the functional coating powder, the chicken paste and water is (2-5):(2-5):(1-3).

7. The method for preparing a cat food with coat-enhancing effects according to claim 1, characterized in that: The ratio of the inner core and the slurry in step S6 is (7-8):(2-3).

8. The method of preparing a cat food having a beauty effect according to claim 7, wherein the cat food is prepared by adding the extract of the plant of the genus Rubus to the cat food. The concentration of acetic acid in the chitosan-acetic acid solution in step S7 is 1-2 wt.%, and the content of chitosan is 1-2 wt.%; the concentration of solute in the mixed aqueous solution of zinc methionine and valerian extract (2-3):1 is 0.2-0.5 wt.%; the mass ratio of chitosan-acetic acid solution, mixed aqueous solution of zinc methionine and valerian extract, chicken liver powder and cassava starch is (8-12):(10-15):(1-3):(1-3); the rotation speed of high-speed homogenization is 5000-8000 rpm, and the homogenization time is 5-8 min; the mass ratio of the mixed solution to flaxseed oil is (8-9):(1-2); and the pressure of micro-jet homogenization is 15-20 MPa.

9. The method for preparing a cat food with coat-enhancing effects according to claim 7, characterized in that: The spraying amount of the outer emulsion in step S8 is 1-2 wt.% of the initial granules of cat food; and the standing time is 10-15 min.

10. Cat food with hair beautifying effect prepared by the preparation method according to any one of claims 1-9.

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