Functional wet food capable of improving hair health of pets and preparation method of functional wet food

Abstract

The invention provides a functional wet food for improving pet hair health and a preparation method thereof, and belongs to the technical field of pet foods.The functional wet food is prepared from, by weight, 40%-45% of meat, 4%-7% of vegetables, 6%-10% of functional microcapsules, 0.2%-0.5% of mineral additives, 0.3%-0.7% of vitamins, 0.5%-1% of natural humectants and the balance deionized water. The functional microcapsule prepared by coating the polyunsaturated fatty acid and the traditional Chinese medicine extract with the chitosan can enhance the stability of the polyunsaturated fatty acid and the palatability of wet grains, and meanwhile, the polyunsaturated fatty acid and the traditional Chinese medicine extract in the microcapsule can achieve a synergistic effect, so that the skin and hair states of pets are improved from inside to outside.

Description

Technical Field

[0001] The present invention relates to the technical field of pet food, and in particular to a functional wet food for improving the health of pet coat and a preparation method thereof. Background Art

[0002] With the rapid development of the pet industry, pet owners are increasingly concerned about their pets' beauty and health. Improving the health of their pet's coat is particularly important, as it is not only a symbol of beauty but also a key indicator of overall health. Therefore, choosing high-quality pet food is crucial in daily feeding. Wet pet food, with its comprehensive nutritional profile, high water content, and excellent palatability, has become a key component of the market.

[0003] Currently, pet wet foods on the market focus primarily on basic nutrition, with few formulas specifically tailored to coat health. These foods primarily rely on supplementing existing nutrients (minerals, vitamins, fatty acids, and amino acids) to improve coat health. However, relying solely on supplemental nutrients often limits the effectiveness of improvements due to individual differences, absorption efficiency, and dosage limitations. Furthermore, some nutrients, such as polyunsaturated fatty acids (PUFAs), are chemically unstable and prone to oxidative rancidity during wet food processing and storage. Oxidation not only leads to a loss of nutritional value and the creation of unpleasant odors, but also produces harmful substances such as free radicals, which can exacerbate oxidative stress and inflammatory responses in the skin, contradicting the original intention of improving coat health.

[0004] More importantly, the deep roots of many coat problems (such as dryness, itching, dandruff, and abnormal hair loss) are closely related to the imbalance of the skin's microecology and chronic low-grade inflammatory response. Existing wet food formulas generally lack the ability to actively regulate the microbial environment and inflammatory state on the skin surface. Although the adjustment of nutritional ingredients can provide basic support, it is difficult to directly and effectively solve the problem of hair loss caused by skin barrier damage. In other words, most of the existing solutions are "passive nourishment" and have significant deficiencies in "active defense" and "source anti-interference." Summary of the Invention

[0005] The object of the present invention is to provide a functional wet food for improving the health of pet coat and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] Functional wet food for improving the health of pet coat includes the following raw material components, calculated by weight percentage: 40-45% meat, 4-7% vegetables, 6-10% functional microcapsules, 0.2-0.5% mineral additives, 0.3-0.7% vitamins, 0.5-1% natural moisturizers, and the balance is deionized water.

[0008] Preferably, the meat includes at least one of fish, chicken, and beef; the vegetables include at least one of carrots, pumpkin, and broccoli; the mineral additive includes a zinc complex, and most preferably, the zinc complex is zinc gluconate.

[0009] Preferably, the vitamins include vitamins A, B2, B6, B7, B 12 , most preferably, the vitamin weight ratio is 3:1:1:2:1.

[0010] Preferably, the natural moisturizing agent comprises aloe vera extract and coconut oil extract in a weight ratio of 1:1.

[0011] The present invention also discloses a method for preparing functional wet food for improving pet coat health, comprising the following steps:

[0012] A1. Wash and cut meat and vegetables into pieces;

[0013] A2. Add the processed meat, vegetables, and an appropriate amount of deionized water from step A1 to a cooking pot and cook at 90-100°C for 20-30 minutes.

[0014] A3. Place the mixture after cooking in step A2 into a homogenizer and stir until it becomes a uniform paste. After the temperature drops below 45°C, add functional microcapsules, mineral additives, vitamins and natural moisturizers and continue stirring.

[0015] A4. Pour the homogenized wet food into aluminum foil bags and seal them using a vacuum sealer. Sterilize the sealed wet food in a gradient sterilization process: 120°C for 10 minutes, then 90°C for 25 minutes. Cool to room temperature to obtain the finished wet food.

[0016] Preferably, the method for preparing the functional microcapsules in step A3 comprises the following steps:

[0017] S1. The core material solution comprises the following raw material components by weight: 5-8% deep-sea fish oil, 5% linseed oil, 5% sunflower oil, 6% evening primrose seed oil, 1.5% vitamin E, 0.5% lecithin, 5-8% magnolia bark extract, 2-5% wolfberry extract, 5-8% astragalus extract, and the balance is 2wt% sodium alginate aqueous solution;

[0018] S2 core material solution oil phase preparation: deep-sea fish oil, linseed oil, sunflower oil, evening primrose seed oil, vitamin E, magnolia bark extract and lecithin in step S1 were heated and stirred to dissolve to obtain the core material solution oil phase;

[0019] S3 core material solution aqueous phase preparation: the wolfberry extract and astragalus extract in step S1 were dissolved in a 2wt% aqueous solution of sodium alginate to obtain an aqueous core material solution;

[0020] S4. The oil phase of step S2 is slowly added to the aqueous phase of step S3 and homogenized under high pressure to obtain a core material solution;

[0021] S5. Calcium chloride was dissolved in an acetic acid solution to obtain a 5% calcium chloride - acetic acid solution, and chitosan was dissolved in a calcium chloride - acetic acid solution to obtain a chitosan solution;

[0022] S6. The core material solution in step S4 is slowly added to the chitosan solution in step S5, the pH is adjusted to 4-5, stirred evenly, and allowed to stand for 1 hour, followed by centrifugation, washing, and freeze-drying to obtain functional microcapsules;

[0023] Specifically, the extraction method of Magnolia Bark Extract comprises the following steps: crushing Magnolia Bark, adding 75-85% ethanol solution, heating to 70-80°C, refluxing extraction three times, combining the extracts, centrifuging to obtain the supernatant, concentrating under reduced pressure, and then drying;

[0024] The wolfberry extract extraction method includes: crushing wolfberries, adding them to deionized water, heating and boiling for 30-40 minutes, repeating the extraction twice, combining the extracts, centrifuging to obtain the supernatant, concentrating under reduced pressure and then drying;

[0025] The extraction method of Astragalus extract is the same as that of Lycium barbarum extract;

[0026] Preferably, in step S2, the stirring temperature is 50-60°C; in step S5, the molecular weight of chitosan is 10-30 kDa, the degree of deacetylation is not less than 90%, and the mass concentration of chitosan in the chitosan solution is 2 wt%; in step S6, the mass ratio of chitosan solution to core material solution is 4:1.

[0027] The beneficial effects of the above technical solution of the present invention are as follows:

[0028] The present invention uses deep-sea fish oil, linseed oil, sunflower seed oil and evening primrose seed oil as sources of ω-3 and ω-6 PUFAs. Both ω-3 and ω-6 PUFAs have a positive impact on hair health, can be embedded in the phospholipid layer of the hair shaft, and improve the light reflectivity of the hair surface; can enhance the cross-linking strength of hair keratin and improve hair toughness. The present invention indirectly regulates the addition ratio of ω-3 and ω-6 by controlling the dosage of the four oils, making it more suitable for improving the coat condition of pets.

[0029] The present invention incorporates Chinese herbal extracts. Magnolia officinalis contains magnolol, which has antibacterial, anti-inflammatory, and gastrointestinal motility-regulating effects; wolfberry contains lycium barbarum polysaccharides, which have immune-regulating and antioxidant functions; and astragalus contains choline, saponins, and sugars, which are anti-inflammatory and enhance immunity. These Chinese herbal ingredients can inhibit skin inflammation, reduce excessive licking and hair loss caused by itching, stabilize the skin environment, reduce inflammatory atrophy of hair follicles, and promote the smooth completion of the normal cycle of growth, rest, and shedding of hair follicles, providing a favorable microecological environment for healthy hair growth and reducing abnormal hair shedding. The Chinese herbal ingredients improve the skin environment, while PUFAs improve hair gloss and toughness. The two work synergistically to improve the skin and coat condition of pets from the inside out.

[0030] The present invention uses chitosan as the wall material to prepare microcapsules, encapsulating PUFA-rich oils and traditional Chinese medicine extracts. Vitamin E and the traditional Chinese medicine extracts are added to inhibit PUFA oxidation. The microencapsulation not only protects the PUFAs from air, slowing their oxidation, but also maximizes their activity during subsequent high-temperature sterilization. Furthermore, encapsulating the traditional Chinese medicine ingredients in the microcapsules reduces their odor and enhances their palatability.

[0031] This product incorporates natural moisturizers, aloe vera extract and coconut oil. Coconut oil, rich in medium-chain fatty acids, quickly penetrates the skin's surface, replenishing the lipid barrier and reducing water loss. Aloe polysaccharides form a water-locking film, increasing the moisture content of the stratum corneum. Together, these two ingredients nourish hair follicles, lock in moisture, and repair hair, significantly improving dryness and roughness, while promoting gloss and smoothness.

[0032] The invention does not contain artificial coloring matter or preservatives and can be eaten for a long time. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0034] If specific experimental procedures or conditions are not specified in this protocol, the procedures or conditions described in the literature in this field can be followed. Reagents or instruments used without manufacturer's information are commercially available.

[0035] Example

[0036] Functional wet food for improving the health of pet coat includes the following raw material components, calculated by weight percentage: 40-45% meat, 4-7% vegetables, 6-10% functional microcapsules, 0.2-0.5% mineral additives, 0.3-0.7% vitamins, 0.5-1% natural moisturizers, and the balance is deionized water.

[0037] The meat includes at least one of fish, chicken and beef; the vegetables include at least one of carrot, pumpkin and broccoli; the mineral additives include zinc complex, preferably zinc gluconate; the vitamins include vitamins A, B2, B6, B7, B 12 , with a weight ratio of 3:1:1:2:1; the natural moisturizer includes aloe vera extract and coconut oil extract in a weight ratio of 1:1.

[0038] A method for preparing functional wet food for improving pet coat health comprises the following steps:

[0039] A1. Wash and cut meat and vegetables into pieces;

[0040] A2. Add the processed meat, vegetables, and an appropriate amount of deionized water from step A1 to a cooking pot and cook at 90-100°C for 20-30 minutes.

[0041] A3. Place the mixture after cooking in step A2 into a homogenizer and stir until it becomes a uniform paste. After the temperature drops below 45°C, add functional microcapsules, mineral additives, vitamins and natural moisturizers and continue stirring.

[0042] A4. Pour the homogenized wet food into aluminum foil bags and seal them using a vacuum sealer. Sterilize the sealed wet food in a gradient sterilization process: 120°C for 10 minutes, then 90°C for 25 minutes. Cool to room temperature to obtain the finished wet food.

[0043] Specifically, the preparation method of the functional microcapsules in step A3 includes the following steps:

[0044] S1. The core material solution comprises the following raw material components by weight: 5-8% deep-sea fish oil, 5% linseed oil, 5% sunflower oil, 6% evening primrose seed oil, 1.5% vitamin E, 0.5% lecithin, 5-8% magnolia bark extract, 2-5% wolfberry extract, 5-8% astragalus extract, and the balance is 2wt% sodium alginate aqueous solution;

[0045] S2 core material solution oil phase preparation: deep-sea fish oil, linseed oil, sunflower oil, evening primrose seed oil, vitamin E, Magnolia bark extract and lecithin in step S1 were heated with stirring at a stirring temperature of 50 to 60 ° C to dissolve the core material solution oil phase;

[0046] S3 core material solution aqueous phase preparation: the wolfberry extract and astragalus extract in step S1 were dissolved in a 2wt% aqueous solution of sodium alginate to obtain an aqueous core material solution;

[0047] S4. The oil phase of step S2 is slowly added to the aqueous phase of step S3 and homogenized under high pressure to obtain a core material solution;

[0048] S5. Calcium chloride was dissolved in an acetic acid solution to obtain a 5% calcium chloride - acetic acid solution, and chitosan (molecular weight 10 to 30 kDa, deacetylation degree not less than 90%) was dissolved in a calcium chloride - acetic acid solution to obtain a 2wt% chitosan solution;

[0049] S6. Slowly add the core material solution in step S4 to the chitosan solution in step S5, with a mass ratio of chitosan solution to core material solution of 4:1, adjust the pH to 4-5, stir evenly, let stand for 1 hour, then centrifuge, wash, and freeze-dry to obtain functional microcapsules.

[0050] Example 1

[0051] The functional wet food for improving pet coat health and the preparation method thereof according to the above embodiment include the following components by weight percentage:

[0052] Meat 45%, vegetables 4%, functional microcapsules 10%, mineral additives 0.4%, vitamins 0.5%, natural moisturizer 0.7%, and the balance is deionized water.

[0053] The core material solution of the functional microcapsule includes the following raw material components in terms of weight percentage:

[0054] Deep-sea fish oil 5%, linseed oil 5%, sunflower seed oil 5%, evening primrose seed oil 6%, vitamin E 1.5%, lecithin 0.5%, magnolia bark extract 8%, wolfberry extract 5%, astragalus extract 8%, and the balance is 2wt% sodium alginate aqueous solution.

[0055] Example 2

[0056] The functional wet food for improving pet coat health and the preparation method thereof according to the above embodiment include the following components by weight percentage:

[0057] Meat 40%, vegetables 7%, functional microcapsules 8%, mineral additives 0.2%, vitamins 0.3%, natural moisturizer 1%, and the balance is deionized water.

[0058] The core material solution of the functional microcapsule includes the following raw material components in terms of weight percentage:

[0059] Deep sea fish oil 8%, linseed oil 5%, sunflower seed oil 5%, evening primrose seed oil 6%, vitamin E 1.5%, lecithin 0.5%, magnolia bark extract 8%, wolfberry extract 2%, astragalus extract 5%, the balance is 2wt% sodium alginate aqueous solution.

[0060] Example 3

[0061] The functional wet food for improving pet coat health and the preparation method thereof according to the above embodiment include the following components by weight percentage:

[0062] Meat 42%, vegetables 6%, functional microcapsules 6%, mineral additives 0.5%, vitamins 0.7%, natural moisturizer 0.5%, and the balance is deionized water.

[0063] The core material solution of the functional microcapsule includes the following raw material components in terms of weight percentage:

[0064] Deep-sea fish oil 7%, linseed oil 5%, sunflower seed oil 5%, evening primrose seed oil 6%, vitamin E 1.5%, lecithin 0.5%, magnolia bark extract 5%, wolfberry extract 5%, astragalus extract 8%, and the balance is 2wt% sodium alginate aqueous solution.

[0065] Comparative Example 1

[0066] The difference between this embodiment and Example 1 is that no functional microcapsules are added.

[0067] Comparative Example 2

[0068] The difference between this embodiment and Example 1 is that the Magnolia Bark Extract, Lycium Barbarum Extract and Astragalus Root Extract are not added into the functional microcapsules.

[0069] Comparative Example 3

[0070] The difference from Example 1 is that deep-sea fish oil, linseed oil, sunflower seed oil and evening primrose seed oil are not added to the functional microcapsules.

[0071] Comparative Example 4

[0072] The difference from Example 1 is that deep-sea fish oil and linseed oil are not added to the functional microcapsules.

[0073] Comparative Example 5

[0074] The difference from Example 1 is that no sunflower seed oil and evening primrose seed oil are added to the functional microcapsules.

[0075] Comparative Example 6

[0076] The difference between the embodiment 1 and the embodiment 1 is that chitosan is not used for coating, and the following components are included in weight percentage:

[0077] Meat 45%, vegetables 4%, deep-sea fish oil 0.5%, flaxseed oil 0.5%, sunflower oil 0.5%, evening primrose seed oil 0.6%, vitamin E 0.15%, lecithin 0.05%, magnolia bark extract 0.8%, wolfberry extract 0.5%, astragalus extract 0.8%, mineral additives 0.4%, vitamins 0.5%, natural moisturizer 0.7%, and the balance is deionized water.

[0078] In step A3, replace “functional microcapsules” with “deep-sea fish oil, linseed oil, sunflower seed oil, evening primrose seed oil, vitamin E, lecithin, magnolia bark extract, wolfberry extract, and astragalus extract”.

[0079] Ninety male beagle dogs weighing 9-10 kg and aged 3-4 years with mild idiopathic pruritus (not infected with parasites) were selected. They were fed a basic dog food for the first two weeks and then randomly divided into nine groups of 10. Groups 1 to 9 were fed the wet pet food of Examples 1-3 and Comparative Examples 1-6, respectively. On days 0, 14, 28, and 56 of the experiment, six professionals were assigned to score the coat condition of each beagle according to the scoring criteria in Table 1 and the results were summarized and statistically analyzed. The coat condition scores and relative growth rates are shown in Table 2. The skin pruritus of each beagle was evaluated according to the scoring criteria in Table 3. The therapeutic index is (pre-treatment score - post-treatment score) / pre-treatment score × 100%. The therapeutic index results are shown in Table 4.

[0080] Table 1 Scoring criteria for beagle coat condition

[0081]

[0082] Table 2 Beagle coat condition scores and relative growth rates

[0083]

[0084]

[0085] Note: Relative growth rate is (score on day N - score on day 0) / score on day 0 × 100%.

[0086] Table 3 Scoring criteria for skin pruritus in pet dogs

[0087]

[0088] Table 4 Treatment index of pruritus in pet dogs

[0089]

[0090] Note: Relative growth rate is (score on day N - score on day 0) / score on day 0 × 100%.

[0091] On days 0 and 56 of the experiment, the moisture and oil content of the beagle dogs' back skin was measured using a skin moisture meter. The tests were conducted in a spacious, well-ventilated room with relatively stable temperature (around 25°C) and humidity (75% to 85%). The same staff member performed three repeated measurements on a shaved area (4 cm x 4 cm) in the middle of the beagle's back, averaging the values. The shaved areas on days 0 and 56 were adjacent to each other.

[0092] Table 5 Water and oil content and relative growth rates on the skin surface of beagle dogs

[0093]

[0094] Note: Relative growth rate is (value on day N - value on day 0) / value on day 0 × 100%.

[0095] On the 0th and 56th days of the test, the back hair was combed with a pet hair comb, and the combing was repeated 10 times. The fallen hair was collected and weighed using an analytical balance. The hair loss reduction rate was (hair loss on the 0th day - hair loss on the 56th day) / hair loss on the 0th day × 100%.

[0096] Table 6 Beagle hair loss reduction rate

[0097]

[0098]

[0099] As can be seen from Tables 2, 4, 5 and 6, Examples 1 to 3 significantly improved the coat and skin surface conditions, effectively treated skin itching, and significantly reduced hair loss; Comparative Example 1 did not add functional microcapsules, and the improvement effect on the coat and skin surface conditions was the worst, and there was no therapeutic effect on skin itching. Instead, the symptoms were aggravated, and hair loss was severe; Comparative Example 2 only added PUFAs, which could improve the coat and skin surface conditions to a certain extent, but compared with the examples, the effect was poorer, and the therapeutic effect on skin itching was even worse; Comparative Example 3 only added traditional Chinese medicine extracts, which had a certain improvement effect on the coat and skin surface conditions and had a certain degree of therapeutic effect on skin itching, but was weaker than the therapeutic effect of the examples; Comparative Examples 4 and 5 contained traditional Chinese medicine extracts and some PUFAs, which improved the coat and skin surface conditions and had a certain degree of therapeutic effect on skin itching, but the effect was poorer than that of the examples; Comparative Example 6 did not use chitosan coating, and high-temperature sterilization resulted in reduced PUFAs activity, worse improvement in the coat and skin surface conditions, and had a certain therapeutic effect on skin itching.

[0100] Comparing the data from Examples 1-3 with Comparative Examples 1-6, it can be seen that the addition of PUFAs can improve the surface condition of a pet's coat and skin, increasing coat gloss and skin moisturization, and reducing hair loss. However, the effect on itchy skin is minimal, and use alone is ineffective, especially for pets with mild skin inflammation, where the coat condition is minimally improved. Furthermore, high temperatures affect the activity of PUFAs, and microencapsulation can improve their performance. Adding traditional Chinese medicine ingredients can significantly improve itchy skin symptoms, reduce direct physical damage to the hair caused by scratching and licking, and reduce interference with the normal function and growth cycle of hair follicles. It can repair the skin barrier, fundamentally reverse coat damage, and restart healthy hair growth. Co-encapsulating PUFAs and traditional Chinese medicine extracts in chitosan not only improves the stability of the PUFAs, but also masks the taste of the traditional Chinese medicine extracts, enhancing palatability. Adding them to pet wet food can synergistically improve the skin and hair follicle condition from the inside out, fundamentally improving the condition of a pet's coat.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. Functional wet food that improves pet coat health, characterized by: Calculated by weight percentage, the raw material components include: 40-45% meat, 4-7% vegetables, 6-10% functional microcapsules, 0.2-0.5% mineral additives, 0.3-0.7% vitamins, 0.5-1% natural moisturizers, and the balance is deionized water.

2. The functional wet food for improving pet coat health according to claim 1, characterized in that: The meat includes at least one of fish, chicken, and beef; the vegetables include at least one of carrot, pumpkin, and broccoli; and the mineral additive includes a zinc complex.

3. The functional wet food for improving pet coat health according to claim 1, characterized in that: Vitamins include vitamin A, B2, B6, B7, B 12 .

4. The functional wet food for improving pet coat health according to claim 1, characterized in that: The natural moisturizer includes aloe vera extract and coconut oil extract in a 1:1 weight ratio.

5. The method for preparing the functional wet food for improving pet coat health according to any one of claims 1 to 4, characterized in that: The following steps are involved: A1. Wash and cut meat and vegetables into pieces; A2. Add the processed meat, vegetables, and an appropriate amount of deionized water from step A1 to a cooking pot and cook at 90-100°C for 20-30 minutes. A3. Place the mixture after cooking in step A2 into a homogenizer and stir until it becomes a uniform paste. After the temperature drops below 45°C, add functional microcapsules, mineral additives, vitamins and natural moisturizers and continue stirring. A4. Pour the homogenized wet food into aluminum foil bags and seal them using a vacuum sealer. Sterilize the sealed wet food in a gradient sterilization process: 120°C for 10 minutes, then 90°C for 25 minutes. Cool to room temperature to obtain the finished wet food.

6. The method for preparing the functional wet food according to claim 5, characterized in that: The method for preparing the functional microcapsules in step A3 comprises the following steps: S1. The core material solution comprises the following raw material components by weight: 5-8% deep-sea fish oil, 5% linseed oil, 5% sunflower oil, 6% evening primrose seed oil, 1.5% vitamin E, 0.5% lecithin, 5-8% magnolia bark extract, 2-5% wolfberry extract, 5-8% astragalus extract, and the balance is 2wt% sodium alginate aqueous solution; S2 core material solution oil phase preparation: deep-sea fish oil, linseed oil, sunflower oil, evening primrose seed oil, vitamin E, magnolia bark extract and lecithin in step S1 were heated and stirred to dissolve to obtain the core material solution oil phase; S3 core material solution aqueous phase preparation: the wolfberry extract and astragalus extract in step S1 were dissolved in a 2wt% aqueous solution of sodium alginate to obtain an aqueous core material solution; S4. The oil phase of step S2 is slowly added to the aqueous phase of step S3 and homogenized under high pressure to obtain a core material solution; S5. Calcium chloride was dissolved in an acetic acid solution to obtain a 5% calcium chloride - acetic acid solution, and chitosan was dissolved in a calcium chloride - acetic acid solution to obtain a chitosan solution; S6. Slowly add the core material solution in step S4 to the chitosan solution in step S5, adjust the pH to 4-5, stir evenly, let it stand for 1 hour, then centrifuge, wash, and freeze-dry to obtain functional microcapsules.

7. The method for preparing the functional wet food according to claim 6, characterized in that: In step S2, the stirring temperature is 50-60°C.

8. The method for preparing the functional wet food according to claim 6, wherein: In step S5, the molecular weight of chitosan is 10 to 30 kDa, the degree of deacetylation is not less than 90%, and the mass concentration of chitosan in the chitosan solution is 2 wt%.

9. The method for preparing the functional wet food according to claim 6, wherein: In step S6, the mass ratio of the chitosan solution to the core material solution is 4:1.

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