A pet instant freeze-dried composition and a preparation method and application thereof

Abstract

The application discloses a kind of pet instant freeze-drying composition and its preparation method and application, belong to pet food technical field.The composition includes 10%~30% concentrated chicken juice or fish juice meat paste, 0%~5% duck breast mud, 0%~5% goat milk powder, 1%~5% enzymatic meat paste, 1%~3% duck oil, 1%~3% fish oil, 5%~15.5% malt dextrin, 0.5%~2% soluble dietary fiber, 1%~5% fruit and vegetable ingredients, 0.1%~0.3% vitamin E, 0.1%~2% emulsifying stabilizer and 0.1%~1% flavor modifier, the balance is water.The composition has the characteristics of quick dissolving, and can improve the drinking water intake and feeding willingness of pets when used for single brewing drinking or mixing grain feeding.The composition can also improve the total antioxidant capacity of pets, reduce lipid peroxidation level, and improve the risk of intestinal inflammation caused by insufficient drinking water.

Description

Technical Field

[0001] This invention relates to the field of pet food technology, and more specifically, to a pet instant freeze-dried composition, its preparation method, and its application. Background Technology

[0002] With the continuous expansion of pet dog ownership, canine health management has received increasing attention. Among these issues, insufficient water intake has become a significant factor affecting the health of the canine urinary system, intestinal homeostasis, and metabolic function. Long-term insufficient water intake can lead to concentrated urine, an increased risk of urinary stones, and may induce intestinal inflammation and elevated levels of oxidative stress.

[0003] In the pet food processing industry, liquid broth or powdered palatability enhancers are often mixed with water to improve dogs' drinking behavior. However, liquid broth products have a high water content and are prone to oil oxidation and microbial spoilage at room temperature, resulting in a short shelf life and high storage and transportation costs. Meanwhile, conventional powdered palatability enhancers have poor dispersibility in cold water, slow flavor release, and are prone to clumping, making it difficult to quickly form a uniform and stable palatable liquid in water.

[0004] Existing products typically focus only on flavor induction, neglecting the compatibility and activity retention of functional components and flavor matrices during processing. This makes it difficult to simultaneously achieve rapid dissolution, improved palatability, and regulation of physiological activity within the same composition. Therefore, there is an urgent need to develop an instant freeze-dried composition for pet food that exhibits excellent dissolution properties, rapid flavor release, and functional stability.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a pet instant freeze-dried composition, its preparation method and application, in order to solve or improve at least one of the above-mentioned technical problems.

[0007] This invention can be implemented as follows: In a first aspect, the present invention provides a pet instant freeze-dried composition, which, by mass percentage, comprises 10% to 30% concentrated chicken or fish broth meat paste, 0% to 5% duck breast meat paste, 0% to 5% goat milk powder, 1% to 5% enzymatically hydrolyzed meat paste, 1% to 3% duck oil, 1% to 3% fish oil, 5% to 15.5% maltodextrin, 0.5% to 2% soluble dietary fiber, 1% to 5% fruit and vegetable components, 0.1% to 0.3% vitamin E, 0.1% to 2% emulsifying stabilizer, and 0.1% to 1% flavor modifier, with the balance being water.

[0008] In an optional embodiment, the pet instant freeze-dried composition comprises, by weight percentage, 15% to 30% concentrated chicken or fish broth, 3% to 5% duck breast meat paste, 3% to 4% goat milk powder, 3% to 4% enzymatically hydrolyzed meat paste, 1.5% to 3% duck oil, 1.5% to 3% fish oil, 10.5% to 15.5% maltodextrin, 1% to 2% soluble dietary fiber, 2.5% to 5% fruit and vegetable components, 0.1% to 0.3% vitamin E, 0.5% to 2% emulsifying stabilizer, and 0.2% to 1% flavor modifier, with the balance being water.

[0009] In an optional embodiment, the pet instant freeze-dried composition comprises, by weight percentage, 20% concentrated chicken or fish broth, 3% duck breast meat paste, 3% goat milk powder, 3% enzymatically hydrolyzed meat paste, 1.5% duck oil, 1.5% fish oil, 12.5% ​​maltodextrin, 1% soluble dietary fiber, 2.5% fruit and vegetable ingredients, 0.1% vitamin E, 0.5% emulsifying stabilizer, and 0.2% flavor modifier, with the balance being water.

[0010] In an optional embodiment, the soluble dietary fiber includes at least one of fructooligosaccharides and inulin; And / or, the fruit and vegetable ingredients include at least one of kale, squash and goji berries; And / or, the emulsifying stabilizer includes at least one of monoglycerides, lecithin, sodium caseinate, microcrystalline cellulose, and citrus fiber; And / or, flavor modifiers include at least one of yeast extract, amino acid flavoring agents, and nucleotides.

[0011] In an optional embodiment, the soluble dietary fiber includes both fructooligosaccharides and inulin; And / or, the emulsifying stabilizer includes both microcrystalline cellulose and citrus fiber.

[0012] Secondly, the present invention provides a method for preparing a pet instant freeze-dried composition as described in any of the foregoing embodiments, comprising the following steps: mixing concentrated chicken or fish broth, duck breast meat paste, goat milk powder, enzymatically hydrolyzed meat paste, duck oil, fish oil, maltodextrin, soluble dietary fiber, fruit and vegetable components, vitamin E, emulsifying stabilizer, flavor modifier and water according to a preset ratio to obtain a mixed slurry; and freeze-drying the mixed slurry.

[0013] In an optional embodiment, the preparation of the mixed slurry includes: mixing concentrated chicken or fish broth, duck breast meat paste, and enzymatically hydrolyzed meat paste to obtain a first mixture; adding goat milk powder, maltodextrin, soluble dietary fiber, fruit and vegetable ingredients, and vitamin E to the first mixture and mixing to obtain a second mixture; adding duck oil, fish oil, emulsifying stabilizer, and flavor modifier to the second mixture, and shearing and emulsifying to obtain a third mixture; adding water to the third mixture and mixing, followed by vacuum degassing to obtain the mixed slurry.

[0014] In an optional implementation, the shearing is performed at 1000 rpm to 3000 rpm for 5 to 15 minutes.

[0015] In an optional embodiment, the mixture is further subjected to a pre-freezing treatment before freeze drying; And / or, after freeze-drying, sterilization is also included.

[0016] Thirdly, the present invention provides an application of the pet instant freeze-dried composition as described in any of the foregoing embodiments, using the pet instant freeze-dried composition to prepare pet food.

[0017] Fourthly, the present invention provides a pet food containing the pet instant freeze-dried composition of any of the foregoing embodiments.

[0018] The beneficial effects of this invention include: This invention creates a pet-friendly, freeze-dried composition by combining specific components in a specific ratio. This composition exhibits rapid dissolution and, when used alone to prepare drinking water or mixed with food, quickly releases a unique aroma, increasing water intake and appetite in pets (such as dogs). The composition contains fish oil, fruit and vegetable components, and vitamin E, which, after consumption, help improve the pet's overall antioxidant capacity, reduce lipid peroxidation levels, and to some extent mitigate the risk of intestinal inflammation caused by insufficient water intake. Therefore, this pet-friendly, freeze-dried composition not only effectively solves the problems of poor solubility and slow flavor release in traditional dog water-enhancing products, but also achieves a reasonable balance between palatability, solubility, and functionality (nutritional supplementation), which helps increase daily water intake in dogs, improve palatability, reduce intestinal inflammation indicators, and enhance the body's antioxidant capacity. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the pet instant freeze-dried composition prepared in Example 1; Figure 2 This is a back view of the pet instant freeze-dried composition prepared in Example 1; Figure 3 This is a side view of the pet instant freeze-dried composition prepared in Example 1. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0022] The following is a detailed description of the pet instant freeze-dried composition, its preparation method, and its application provided by the present invention.

[0023] This invention provides a pet instant freeze-dried composition, which, by weight percentage, comprises 10% to 30% concentrated chicken or fish broth meat paste, 0% to 5% duck breast meat paste, 0% to 5% goat milk powder, 1% to 5% enzymatically hydrolyzed meat paste, 1% to 3% duck oil, 1% to 3% fish oil, 5% to 15.5% maltodextrin, 0.5% to 2% soluble dietary fiber, 1% to 5% fruit and vegetable components, 0.1% to 0.3% vitamin E, 0.1% to 2% emulsifying stabilizer, and 0.1% to 1% flavor modifier, with the balance being water.

[0024] Both concentrated chicken broth and fish broth have strong solubility, but compared to concentrated fish broth, concentrated chicken broth is more effective at increasing water intake in pets (such as dogs). This is because concentrated fish broth is rich in collagen and small peptides, with a strong fresh fish flavor, and its appeal to dogs varies from person to person. Concentrated chicken broth, on the other hand, is low in salt, high in protein, and high in organic calcium and phosphorus, making its flavor more palatable to most dogs. It should be noted that the Maillard reaction occurs during the high-temperature cooking process, releasing a large amount of free amino acids and peptides, significantly enhancing the umami and meaty aroma of the broth, thus improving its palatability and increasing dog food intake.

[0025] Duck breast meat paste is made by chopping and mincing duck breast meat. It can not only be dispersed and fully incorporated into the broth quickly and evenly, but also provide pets (such as dogs) with nutrients such as iron, zinc, selenium, and B vitamins.

[0026] Goat milk powder is rich in whey protein and medium- and short-chain fatty acids. Due to its extremely low levels of allergens (such as α-S1 casein) and high digestibility, goat milk is less allergenic and less tolerant to pets (such as dogs) compared to cow milk. In addition, goat milk powder dissolves to a milky white color and releases a special milky aroma, which can enhance pets' appetite and improve the solubility of freeze-dried broths.

[0027] Enzymatic hydrolysis of meat paste can improve digestibility and absorption.

[0028] Duck fat can be used to supplement essential fatty acids.

[0029] Fish oil contains unsaturated fatty acids, which can help improve the antioxidant capacity of pets (such as dogs) and reduce lipid peroxidation levels.

[0030] Maltodextrin can be quickly converted into carbohydrates after being fed to pets (such as dogs), and it will hardly burden the digestion of dogs. In addition, maltodextrin can dissolve quickly in both cold and warm water and can slightly thicken the water, thus having a certain water-retention effect and can be used as an instant carrier.

[0031] Soluble dietary fiber has functions such as delaying sugar absorption, lowering postprandial blood glucose, improving gut microbiota, and softening stool. Furthermore, soluble dietary fiber can form a gel-like viscous substance after absorbing water, which can improve the stability of the composition and enhance its water-soluble effect. In some optional embodiments, soluble dietary fiber may exemplary include at least one of fructooligosaccharides and inulin. In some more preferred embodiments, soluble dietary fiber includes both fructooligosaccharides and inulin, wherein the mass ratio of fructooligosaccharides to inulin can be 8:2. When soluble dietary fiber contains both fructooligosaccharides and inulin, it has a higher overall value in gut health compared to fructooligosaccharides alone or inulin alone.

[0032] The fruit and vegetable ingredients are rich in vitamins and antioxidant trace elements, and long-term consumption can improve the anti-inflammatory, digestive, and intestinal immune functions of pets (such as dogs). In some optional embodiments, the fruit and vegetable ingredients may exemplary include at least one of kale, pumpkin, and goji berries. It should be noted that this application specifically uses at least one of kale, pumpkin, and goji berries as the fruit and vegetable ingredients, as these fruits and vegetables are less prone to oxidative browning during freeze-drying. In contrast, common blueberries or other berries are prone to oxidative browning during freeze-drying, which can even affect the visual appearance of the soup.

[0033] Vitamin E can be combined with fish oil to enhance the antioxidant capacity of pets (such as dogs) and reduce lipid peroxidation levels.

[0034] Emulsifying stabilizers help lock in moisture during the preparation of the composition to form a stable fluid, facilitating processing. Furthermore, emulsifying stabilizers also have rapid water-dissolving properties, which helps accelerate intestinal peristalsis in pets (such as dogs) and improve defecation. In some optional embodiments, the emulsifying stabilizer may exemplary include at least one of monoglycerides, lecithin, sodium caseinate, microcrystalline cellulose, and citrus fiber. In some more preferred embodiments, the emulsifying stabilizer includes both microcrystalline cellulose and citrus fiber, wherein the mass ratio of microcrystalline cellulose to citrus fiber can be 100:5. It should be noted that when the emulsifying stabilizer contains both microcrystalline cellulose and citrus fiber, it exhibits higher overall stability compared to containing only microcrystalline cellulose or only citrus fiber. In this invention, citrus fiber has the characteristics of charged adsorption and high water and oil holding capacity, possesses inherent emulsifying activity, and can effectively reduce water separation and oil floating, showing better performance than other emulsifying stabilizer components in acidic sauces and frozen meat products. Combining it with an appropriate amount of microcrystalline cellulose can improve the fluidity of citrus fiber when used alone, facilitating the shaping of frozen products.

[0035] Flavor modifiers can enhance the flavor of a composition, thus acting as an appetite stimulant. In some alternative embodiments, the flavor modifier may exemplary include at least one of yeast extract, amino acid flavoring agents, and nucleotides.

[0036] Continuing from the above, the pet instant freeze-dried composition provided by this invention combines animal-derived flavorings with goat milk powder having a frankincense flavor, which helps increase pets' (such as dogs) willingness to drink water; the unsaturated fatty acids in fish oil, combined with natural vitamin E, help improve the antioxidant capacity of pets (such as dogs) and reduce lipid peroxidation levels; fruit and vegetable components can provide pets (such as dogs) with natural antioxidants, which help maintain the stability of their intestinal microenvironment and reduce the risk of inflammatory responses. This pet instant freeze-dried snack can be prepared as a soup for pets (such as dogs) to drink alone, or it can be mixed with pet dry food for feeding. It helps increase pets' (such as dogs) daily water intake, improve palatability, reduce intestinal inflammation indicators, and increase the body's total antioxidant capacity (T-AOC) and reduce malondialdehyde (MDA) levels, thus having good palatability and nutritional supplementation effects.

[0037] In some optional embodiments, the content of concentrated chicken broth or fish broth in the pet instant freeze-dried composition can be 10%, 12%, 15%, 18%, 20%, 22%, 25%, 28%, or 30%, or other values ​​within the range of 10% to 30%. If the content of concentrated chicken broth or fish broth is less than 10%, after the frozen soup cubes are rehydrated and dissolved, the amount of solids in the soup that can enhance the palatability of pets (such as dogs) will be low, which will reduce the pet's (such as dogs') willingness to drink water; if the content of concentrated chicken broth or fish broth is higher than 30%, the overall cost will be significantly increased, and the process cost of frozen production will also be increased.

[0038] The content of duck breast meat paste in the pet instant freeze-dried composition can be 0%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%, or other values ​​within the range of 0% to 5%. If the content of duck breast meat paste in the pet instant freeze-dried composition is higher than 5%, it will not be conducive to the complete dissolution of the frozen soup cubes, and it is easy to produce floating oil, sediment, and a raw duck meat smell.

[0039] The content of goat milk powder in instant freeze-dried pet products can be 0%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%, or other values ​​within the range of 0% to 5%. Adding goat milk powder to instant freeze-dried pet products can neutralize the odor and texture of a single ingredient, making the broth smoother in both flavor and texture. If the goat milk powder content in the instant freeze-dried product exceeds 5%, it will not only increase costs but also easily mask the odor of concentrated chicken broth (or fish broth / meat paste).

[0040] The content of enzymatically hydrolyzed meat paste in the pet instant freeze-dried composition can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%, or other values ​​within the range of 1% to 5%. If the content of enzymatically hydrolyzed meat paste is less than 1%, the aroma and taste of the enzymatically hydrolyzed meat paste will be diluted, reducing its palatability. If the content of enzymatically hydrolyzed meat paste is greater than 5%, the color of the soup after rehydration of the instant freeze-dried product will be affected, turning the soup grayish. An overly strong enzymatic flavor can easily cause anorexia in dogs if fed this product for a long time.

[0041] The duck oil content in the pet instant freeze-dried composition can be 1%, 1.5%, 2%, 2.5%, or 3%, or other values ​​within the range of 1% to 3%. If the duck oil content is less than 1%, it is not conducive to the taste experience of pets (such as dogs) who are directly fed instant freeze-dried blocks; if the duck oil content is higher than 3%, the instant freeze-dried blocks are more likely to separate into oils, and the oil is more likely to float to the surface after dissolving in water.

[0042] The fish oil content in the pet instant freeze-dried product composition can be 1%, 1.5%, 2%, 2.5%, or 3%, or other values ​​within the range of 1% to 3%. If the fish oil content is less than 1%, the DHA and EPA content in the instant freeze-dried block will be too low; if the fish oil content is higher than 3%, the cost will increase too much, and the high oil content will cause oil separation in the instant freeze-dried block.

[0043] The maltodextrin content in the pet instant freeze-dried composition can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, 12.5%, 13%, 13.5%, 14%, 14.5%, 15%, or 15.5%, or other values ​​within the range of 5% to 15.5%. Maltodextrin maintains the particle shape and structure after freeze-drying. If the maltodextrin content is below 5%, it is not conducive to quick-freezing and molding of the composition; if the maltodextrin content is above 15.5%, the taste of the instant freeze-dried composition will be relatively poor, making it less appealing to pets (such as dogs) to actively consume it.

[0044] The soluble dietary fiber content in pet instant freeze-dried compositions can be 0.5%, 1%, 1.5%, or 2%, or other values ​​within the range of 0.5% to 2%. Soluble dietary fiber not only improves the digestive burden on pets but also has a rapid water absorption and retention effect. If the soluble dietary fiber content is below 0.5%, the water-dissolving efficiency will be reduced; if the soluble dietary fiber content is above 2%, the freeze-drying time and energy consumption will be increased.

[0045] The content of fruit and vegetable ingredients in the instant freeze-dried pet food composition can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%, or other values ​​within the range of 1% to 5%. If the content of fruit and vegetable ingredients is less than 1%, the content of vitamins and antioxidants in the instant freeze-dried composition will be low; if the content of fruit and vegetable ingredients is higher than 5%, precipitation and staining of the broth are likely to occur, affecting the original color of the concentrated soup.

[0046] The vitamin E content in pet instant freeze-dried compositions can be 0.1%, 0.15%, 0.2%, 0.25%, or 0.3%, or other values ​​within the range of 0.1% to 0.3%. If the vitamin E content is below 0.1%, the antioxidant effect is low and it is easily lost during processing; if the vitamin E content is above 0.3%, the corresponding cost increases and the utilization rate is insufficient.

[0047] The content of emulsifying stabilizer in the pet instant freeze-dried composition can be 0.1%, 0.5%, 1%, 1.5%, or 2%, or other values ​​within the range of 0.1% to 2%. If the content of emulsifying stabilizer is less than 0.1%, it is difficult to achieve good emulsification and stabilization, and dry-wet separation is likely to occur during material mixing; if the content of emulsifying stabilizer is greater than 2%, it is easy to cause excessive viscosity of the material and uneven mixing.

[0048] The content of flavor modifiers in pet instant freeze-dried compositions can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1%, or other values ​​within the range of 0.1% to 1%. If the content of flavor modifiers is less than 0.1%, the flavoring effect after dilution and dispersion will not be obvious; if the content of flavor modifiers is higher than 1%, the taste will be too strong, and long-term feeding may easily cause anorexia.

[0049] In some preferred embodiments, the pet instant freeze-dried composition, by weight percentage, comprises 15%–30% concentrated chicken or fish broth, 3%–5% duck breast meat puree, 3%–4% goat milk powder, 3%–4% enzymatically hydrolyzed meat puree, 1.5%–3% duck oil, 1.5%–3% fish oil, 10.5%–15.5% maltodextrin, 1%–2% soluble dietary fiber, 2.5%–5% fruit and vegetable components, 0.1%–0.3% vitamin E, 0.5%–2% emulsifying stabilizer, and 0.2%–1% flavor modifier, with the balance being water. Within this ratio range, the resulting pet instant freeze-dried composition exhibits a moderate average water dissolution rate (3s–10s), with suitable color and aroma, which can enhance drinking behavior in pets (such as dogs) and provides certain antioxidant, anti-inflammatory, and gut health-promoting effects.

[0050] In some preferred embodiments, the pet instant freeze-dried composition comprises, by weight percentage, 20% concentrated chicken or fish broth, 3% duck breast puree, 3% goat milk powder, 3% enzymatically hydrolyzed meat paste, 1.5% duck fat, 1.5% fish oil, 12.5% ​​maltodextrin, 1% soluble dietary fiber, 2.5% fruit and vegetable components, 0.1% vitamin E, 0.5% emulsifying stabilizer, and 0.2% flavor modifier, with the balance being water. This pet instant freeze-dried composition exhibits superior solubility, enhances water intake in pets (e.g., dogs), and improves pet health (e.g., dogs).

[0051] Continuing from the above, this invention creates a pet-friendly, quick-dissolving freeze-dried composition by combining specific components in a specific ratio. This composition exhibits rapid dissolution, dissolving in water within 3-10 seconds to form a flavorful liquid. It can be used alone for drinking or mixed with food, significantly increasing water intake and appetite in pets (such as dogs). Simultaneously, through the combination of oils, fruit and vegetable components, and antioxidants, this composition enhances the overall antioxidant capacity of pets (such as dogs), reduces lipid peroxidation levels, and to some extent mitigates the risk of intestinal inflammation caused by insufficient water intake in pets (such as dogs). This pet-friendly, quick-dissolving freeze-dried composition combines palatability, nutritional value, and functionality, offering excellent palatability and ease of use.

[0052] Accordingly, the present invention also provides a method for preparing the above-mentioned pet instant freeze-dried composition, comprising the following steps: mixing concentrated chicken or fish broth, duck breast meat paste, goat milk powder, enzymatically hydrolyzed meat paste, duck oil, fish oil, maltodextrin, soluble dietary fiber, fruit and vegetable components, vitamin E, emulsifying stabilizer, flavor modifier and water according to a preset ratio to obtain a mixed slurry; and freeze-drying the mixed slurry.

[0053] In some optional embodiments, the preparation of the mixed slurry may include: mixing concentrated chicken or fish broth, duck breast meat paste, and enzymatically hydrolyzed meat paste to obtain a first mixture; adding goat milk powder, maltodextrin, soluble dietary fiber, fruit and vegetable components, and vitamin E to the first mixture and mixing to obtain a second mixture; adding duck oil, fish oil, emulsifying stabilizer, and flavor modifier to the second mixture, and shearing and emulsifying to obtain a third mixture; adding water to the third mixture and mixing, followed by vacuum degassing to obtain the mixed slurry. The shearing can be performed at 1000 rpm to 3000 rpm (e.g., 1000 rpm, 1500 rpm, 2000 rpm, 2500 rpm, or 3000 rpm) for 5 min to 15 min (e.g., 5 min, 10 min, or 15 min).

[0054] It should be emphasized that the present invention, through the specific mixing sequence of the above-mentioned components, can quickly achieve uniform mixing of materials, thereby avoiding and improving the problems of material clumping and uneven dispersion.

[0055] In some alternative embodiments, the freeze-drying process further includes pre-freezing the mixed slurry. The pre-freezing process may be carried out at -20°C to -40°C (e.g., -20°C, -25°C, -30°C, -35°C, or -40°C) for 2 hours to 6 hours (e.g., 2 hours, 3 hours, 4 hours, 5 hours, or 6 hours).

[0056] In some optional embodiments, freeze drying includes a sublimation drying stage and a desorption drying stage. The sublimation drying stage is carried out for 10 to 15 hours at a vacuum degree ≤30 Pa and a temperature of 40°C to 50°C. The desorption drying stage is carried out for 2 to 5 hours at a temperature of 20°C to 30°C.

[0057] In some alternative embodiments, freeze-drying is followed by sterilization. Sterilization can be performed using gamma rays at a concentration of 2 kGy to 3 kGy.

[0058] It should be noted that although freeze-drying technology can maintain the activity of nutrients and extend the shelf life of products at low temperatures, most freeze-dried pet food products are currently intended for direct feeding. These products are difficult to dissolve quickly in water to form a highly palatable flavored liquid, and they also fail to achieve nutritional fortification and functional regulation while promoting drinking behavior. This invention combines a composition with a specific formulation and freeze-drying technology. Utilizing the porous structure and high specific surface area of ​​freeze-dried products, the composition can rapidly disintegrate in water upon contact.

[0059] Furthermore, the present invention also provides an application of the above-mentioned pet instant freeze-dried composition, for example, the instant freeze-dried composition can be used to prepare pet food.

[0060] Accordingly, the present invention also provides a pet food containing the above-mentioned instant freeze-dried pet composition. This pet food can be a pet snack or a pet nutritional supplement. In practical use, the instant freeze-dried pet composition can be prepared as a soup for dogs to drink, or it can be mixed with dry pet food for feeding.

[0061] The features and performance of the present invention will be further described in detail below with reference to the embodiments. Unless otherwise specified or described above, the raw materials used in the embodiments and comparative examples are all standard raw materials that are conventionally available in commercial markets.

[0062] Example 1 This embodiment provides a pet instant freeze-dried composition, which, by mass percentage, comprises 20% concentrated chicken broth, 3% duck breast paste, 3% goat milk powder, 3% enzymatically hydrolyzed meat paste, 1.5% duck oil, 1.5% fish oil, 12.5% ​​maltodextrin, 1% soluble dietary fiber, 2.5% fruit and vegetable ingredients, 0.1% vitamin E, 0.5% emulsifying stabilizer, and 0.2% flavor modifier, with the balance being water.

[0063] The concentrated chicken broth is a byproduct (water-soluble chicken protein) from the wet-process chicken meal production. The enzymatically hydrolyzed meat paste is a commercially available enzymatically hydrolyzed meat paste product. The soluble dietary fiber consists of fructooligosaccharides and inulin in a mass ratio of 8:2. The fruit and vegetable components are a mixture of kale powder, pumpkin powder, and goji berry powder in a mass ratio of 1:1:1. The emulsifying stabilizer consists of microcrystalline cellulose and citrus fiber in a mass ratio of 100:5. The flavor modifier is a commercially available yeast extract.

[0064] The fast-dissolving lyophilized composition (such as...) Figures 1 to 3 The preparation of (as shown) includes: S1: Mixed protein matrix.

[0065] Concentrated chicken broth, duck breast paste, and enzymatically hydrolyzed meat paste were added to a mixing tank and stirred at 300 rpm for 10 minutes to obtain the first mixture.

[0066] S2: Add dry powder components.

[0067] Add goat milk powder, maltodextrin, soluble dietary fiber, fruit and vegetable ingredients and vitamin E to the first mixture in sequence, and continue stirring for 15 minutes to form a homogeneous slurry (second mixture).

[0068] S3: Oil emulsification.

[0069] After premixing duck oil and fish oil, they were added to the second mixture along with emulsifying stabilizers and flavor modifiers. The mixture was then subjected to high-speed shear emulsification at 2000 rpm for 10 minutes to obtain the third mixture.

[0070] S4: Blending and degassing.

[0071] Add water to the third mixture to the set ratio to obtain a mixed slurry; degas the mixed slurry under vacuum (-0.08MPa) for 10 min.

[0072] S5: Mold forming.

[0073] The degassed slurry is evenly distributed into silicone molds, with each particle weighing approximately 2g.

[0074] S6: Pre-freezing.

[0075] Pre-freeze at -30℃ for 4 hours.

[0076] S7: Freeze-drying.

[0077] First, it was sublimated and dried under a vacuum of 20 Pa and a temperature of 45 °C for 12 h, and then desorbed and dried under a temperature of 25 °C for 3 h.

[0078] S8: Demolding and sterilization.

[0079] After demolding, the product is sterilized by 2.5 kGy gamma ray irradiation.

[0080] Example 2 The difference between this embodiment and Embodiment 1 is that, by mass percentage, the pet instant freeze-dried composition comprises 18% concentrated fish paste, 5% duck breast paste, 3% goat milk powder, 3% enzymatically hydrolyzed meat paste, 1.5% duck oil, 1.0% fish oil, 12.5% ​​maltodextrin, 1% soluble dietary fiber, 2.5% fruit and vegetable components, 0.1% vitamin E, 0.5% emulsifying stabilizer, and 0.2% flavor modifier, with the remainder being water.

[0081] The concentrated fish broth and meat paste is made from a byproduct of the production of cooked fish meal (water-soluble fish lysate protein).

[0082] Example 3 The difference between this embodiment and Embodiment 1 is that, by mass percentage, the pet instant freeze-dried composition comprises 30% concentrated chicken broth, 3% duck breast meat paste, 3% goat milk powder, 4% enzymatically hydrolyzed meat paste, 1.5% duck oil, 1.5% fish oil, 10.5% maltodextrin, 1% soluble dietary fiber, 2.5% fruit and vegetable components, 0.1% vitamin E, 0.5% emulsifying stabilizer, and 0.2% flavor modifier, with the remainder being water.

[0083] Example 4 The difference between this embodiment and Embodiment 1 is that, by mass percentage, the pet instant freeze-dried composition comprises 15% concentrated chicken broth, 4% duck breast meat paste, 4% goat milk powder, 3% enzymatically hydrolyzed meat paste, 1.5% duck oil, 1.5% fish oil, 15.5% maltodextrin, 1% soluble dietary fiber, 2.5% fruit and vegetable components, 0.1% vitamin E, 0.5% emulsifying stabilizer, and 0.2% flavor modifier, with the remainder being water.

[0084] Comparative Example 1 The difference between this comparative example and Example 1 is that, by mass percentage, the pet instant freeze-dried composition comprises 23% duck breast meat paste, 3% goat milk powder, 3% enzymatically hydrolyzed meat paste, 1.5% duck oil, 1.5% fish oil, 12.5% ​​maltodextrin, 1% soluble dietary fiber, 2.5% fruit and vegetable ingredients, 0.1% vitamin E, 0.5% emulsifying stabilizer, and 0.2% flavor modifier, with the balance being water.

[0085] The composition of the pet instant freeze-dried compositions in the above embodiments and comparative examples is shown in Table 1.

[0086] Table 1 Composition of the Composition

[0087] Test case (a) Solubility test and (dog) drinking promotion experiment A. Solubility test: Take 3 samples (1 piece, about 2g each) of the pet instant freeze-dried composition prepared by the comparative example and each embodiment. Add the single freeze-dried granule to a beaker containing 100mL of room temperature water (25℃) and record the time required for complete dissolution using a stopwatch. The results are shown in Table 2.

[0088] Among them, the particles are judged to be completely dissolved when they are put into room temperature water and shaken slightly, and the particles automatically dissolve in the water and shrink to a state that is imperceptible to the naked eye.

[0089] Table 2. Results of Solubility Test

[0090] As can be seen from Table 2, the dissolution rate of the pet quick-dissolving freeze-dried compositions prepared in Examples 1-4 is much higher than that of Comparative Example 1.

[0091] Compared to Examples 3-4, the dissolution rates of the three samples taken from Examples 1-2 were all within 3-10 seconds; the dissolution rate of the second sample in Example 3 exceeded 10 seconds; and the dissolution rates of the three samples in Example 4 all far exceeded 10 seconds. This demonstrates that the pet-soluble freeze-dried compositions of Examples 1-2 possess superior rapid-dissolving properties, capable of spontaneous disintegration and completely dissolving into a homogeneous liquid within 10 seconds without stirring. Specifically, the liquid from Example 1 was a homogeneous milky-white liquid with no obvious sediment.

[0092] B. Water Induction Test: Eighteen healthy adult dogs (weighing 10kg~15kg) were selected and divided into three groups (6 dogs per group) according to their size-to-weight ratio (n=6). These were the control group, experimental group 1, and experimental group 2. The control group was provided with ordinary drinking water. Experimental group 1 received the product from Example 1 of this invention (1g / 100mL water) added to their drinking water, and experimental group 2 received the product from Example 2 of this invention (1g / 100mL water) added to their drinking water. The test lasted for 7 days, and the average water intake of each group was recorded daily. The results are shown in Table 3.

[0093] Table 3. Results of the water intake promotion experiment (mL / day)

[0094] As shown in Table 3, the average water intake of the control group was 520±42 mL / day, and the average water intake of the experimental group 1 (Example 1) was 638±29 mL / day. The water intake of the experimental group 1 was about 22.7% higher than that of the control group (P<0.05), which proves that the pet quick-dissolving freeze-dried composition provided in Example 1 of the present invention can dissolve quickly and significantly increase the water intake of dogs.

[0095] In addition, the water consumption of dogs in Experimental Group 1 (Example 1) was significantly higher than that of dogs in Experimental Group 2 (Example 2) by 544±32 mL / day. This is because the palatability of fish flavor to dogs varies from person to person, resulting in some dogs drinking far less water than dogs drinking chicken or duck flavored products. This indicates that concentrated chicken broth has a higher palatability to dogs, followed by concentrated fish broth.

[0096] Based on the results in Tables 2 and 3 above, Example 1 not only has a moderate water dissolution rate, but also produces a suitable soup color and aroma, resulting in a better effect on promoting drinking in dogs.

[0097] (II) Effects of instant pet food composition on canine eating behavior and antioxidant capacity when mixed with dog food Twenty healthy adult dogs (weighing 10kg-15kg) were randomly divided into two groups (n=10). The control group received basal dog food, while the experimental group received basal dog food plus the pet instant freeze-dried composition from Example 1 (the amount of the pet instant freeze-dried composition added was 5wt% of the basal dog food). The experimental period was 21 days. Dogs were fed twice daily at set times, and their food intake, body condition score, fecal condition, health status, and antioxidant indicators were recorded.

[0098] The physical condition of the dogs was scored using the Standard Canine and Feline Body Conditioning Scale (WSAVA internationally recognized 9-point scale, a unified standard for veterinarians).

[0099] The fecal scoring criteria are shown in Table 4.

[0100] Table 4. Stool Scoring Criteria

[0101] The results are shown in Tables 5 to 9. Table 5. Average daily food intake of dogs (g)

[0102] As shown in Table 5, the average daily food intake of the control group was 125.79±1.36g, while that of the experimental group was 129.87g±1.68g. The dogs' eating status was stable, indicating that continuous feeding of the experimental diet had no adverse effects on the appetite and eating behavior of the experimental dogs.

[0103] Table 6. Changes in the physical condition of the experimental dogs

[0104] As can be seen from Table 6, after 21 days of feeding, there were no significant changes in the body condition of the experimental dogs, indicating that the experimental diet had no adverse effect on the weight of the experimental dogs.

[0105] Table 7. Fecal scores of the test dogs

[0106] As shown in Table 7, after 21 days of feeding, there were no significant changes in the feces of the experimental dogs. Furthermore, the dogs did not exhibit any abnormal symptoms such as vomiting, diarrhea, or lethargy during the experiment, indicating that the experimental diet had no adverse effects on the digestive function of the experimental dogs.

[0107] Table 8 Results of serum antioxidant index determination

[0108] As shown in Table 8, on day 21 of the experiment, the serum levels of GSH-PX (glutathione peroxidase), CAT (catalase), and SOD (superoxide dismutase) in the experimental group were significantly higher than those on day 1 (P<0.05), indicating that the body's ability to scavenge peroxides was enhanced and the antioxidant defense mechanism was strengthened. The results suggest that the experimental diet can reduce oxidative damage, increase antioxidant levels, and improve the health of the dogs.

[0109] Table 9 Results of inflammatory response protein detection

[0110] As shown in Table 9, during the 21-day trial, the IL levels in the experimental group dogs were... 1β, IL 6. TNF The α values ​​all showed a decreasing trend, indicating that the freeze-dried food had an anti-inflammatory effect and could reduce the inflammatory response in dogs.

[0111] Based on the above results, it can be proven that the pet instant freeze-dried composition provided by the present invention can not only improve the cannibalism of dogs, but also significantly enhance their antioxidant capacity and has a good nutritional regulation effect.

[0112] In summary, the pet instant freeze-dried composition provided by this invention, through specific compounding of animal-derived protein matrix, oil system, functional fruit and vegetable components, and instant carrier, achieves a pet instant freeze-dried composition with good structural stability and rapid dissolution characteristics. While maintaining the nutritional activity and flavor integrity of the freeze-dried product, this composition significantly improves its disintegration rate in water through its porous structure, enabling the product to dissolve rapidly into a uniform flavored liquid without external stirring, thereby effectively enhancing dogs' voluntary drinking behavior. Simultaneously, by introducing fruit and vegetable components rich in natural antioxidants and an antioxidant system formed by unsaturated fatty acids and vitamin E, this invention regulates the body's oxidative stress level, significantly improving total antioxidant capacity and reducing lipid peroxidation levels, thereby alleviating to some extent the risk of intestinal inflammation and metabolic stress caused by insufficient water intake or nutritional imbalances. Furthermore, the composition of this invention has both good palatability and palatability. When used as a beverage product, it can significantly increase water intake. When used as a food additive, it can effectively increase feed intake. It effectively solves the problems of poor solubility, insufficient stability and single function of traditional dog water-promoting products. It achieves reasonable regulation and organic unity of palatability (increasing feed intake), quick solubility (promoting water intake) and functionality (supplementing nutrition). Its multi-scenario application characteristics further enhance the product's flexibility of use and practical application value.

[0113] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pet instant freeze-dried composition, characterized in that, By weight percentage, the pet instant freeze-dried composition comprises 10% to 30% concentrated chicken or fish broth, 0% to 5% duck breast meat paste, 0% to 5% goat milk powder, 1% to 5% enzymatically hydrolyzed meat paste, 1% to 3% duck oil, 1% to 3% fish oil, 5% to 15.5% maltodextrin, 0.5% to 2% soluble dietary fiber, 1% to 5% fruit and vegetable components, 0.1% to 0.3% vitamin E, 0.1% to 2% emulsifying stabilizer, and 0.1% to 1% flavor modifier, with the balance being water.

2. The pet instant freeze-dried composition according to claim 1, characterized in that, By weight percentage, the pet instant freeze-dried composition comprises 15% to 30% of the concentrated chicken or fish broth meat paste, 3% to 5% of the duck breast meat paste, 3% to 4% of the goat milk powder, 3% to 4% of the enzymatically hydrolyzed meat paste, 1.5% to 3% of the duck oil, 1.5% to 3% of the fish oil, 10.5% to 15.5% of the maltodextrin, 1% to 2% of the soluble dietary fiber, 2.5% to 5% of the fruit and vegetable components, 0.1% to 0.3% of the vitamin E, 0.5% to 2% of the emulsifying stabilizer, and 0.2% to 1% of the flavor modifier, with the balance being water.

3. The pet instant freeze-dried composition according to claim 2, characterized in that, By weight percentage, the pet instant freeze-dried composition comprises 20% of the concentrated chicken or fish broth, 3% of the duck breast meat paste, 3% of the goat milk powder, 3% of the enzymatically hydrolyzed meat paste, 1.5% of the duck oil, 1.5% of the fish oil, 12.5% ​​of the maltodextrin, 1% of the soluble dietary fiber, 2.5% of the fruit and vegetable ingredients, 0.1% of the vitamin E, 0.5% of the emulsifying stabilizer, and 0.2% of the flavor modifier, with the balance being water.

4. The pet instant freeze-dried composition according to any one of claims 1 to 3, characterized in that, The soluble dietary fiber includes at least one of fructooligosaccharides and inulin; And / or, the fruit and vegetable ingredients include at least one of kale, pumpkin, and goji berries; And / or, the emulsifying stabilizer includes at least one of monoglycerides, lecithin, sodium caseinate, microcrystalline cellulose, and citrus fiber; And / or, the flavor modifier includes at least one of yeast extract, amino acid flavoring agent and nucleotide substance.

5. The pet instant freeze-dried composition according to claim 4, characterized in that, The soluble dietary fiber includes both fructooligosaccharides and inulin; And / or, the emulsifying stabilizer includes both microcrystalline cellulose and citrus fiber.

6. A method for preparing a pet instant freeze-dried composition as described in any one of claims 1 to 5, characterized in that, The process includes the following steps: mixing the concentrated chicken or fish broth meat paste, the duck breast meat paste, the goat milk powder, the enzymatically hydrolyzed meat paste, the duck oil, the fish oil, the maltodextrin, the soluble dietary fiber, the fruit and vegetable components, the vitamin E, the emulsifying stabilizer, the flavor modifier, and water according to a preset ratio to obtain a mixed slurry; and freeze-drying the mixed slurry.

7. The preparation method according to claim 6, characterized in that, The preparation of the mixed slurry includes: mixing the concentrated chicken or fish broth meat paste, the duck breast meat paste, and the enzymatically hydrolyzed meat paste to obtain a first mixture; adding the goat milk powder, the maltodextrin, the soluble dietary fiber, the fruit and vegetable components, and the vitamin E to the first mixture and mixing them to obtain a second mixture; adding the duck oil, the fish oil, the emulsifying stabilizer, and the flavor modifier to the second mixture, and shearing and emulsifying to obtain a third mixture; adding water to the third mixture and mixing, followed by vacuum degassing to obtain the mixed slurry; Preferably, the shearing is performed at 1000 rpm to 3000 rpm for 5 min to 15 min.

8. The preparation method according to claim 6, characterized in that, The freeze-drying process also includes pre-freezing the mixed slurry. And / or, after freeze-drying, sterilization is also included.

9. The application of a pet instant freeze-dried composition as described in any one of claims 1 to 5, characterized in that, The pet instant freeze-dried composition is used to prepare pet food.

10. A pet food, characterized in that, The pet food contains the pet instant freeze-dried composition according to any one of claims 1 to 5.

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