Milk protein peptide compositions that promote digestion and absorption in pets and their applications

Abstract

This invention discloses a milk protein peptide composition that promotes digestion and absorption in pets and its applications. The milk protein peptide composition comprises casein phosphopeptide and casein calcium peptide; wherein the mass ratio of casein phosphopeptide to casein calcium peptide is 1:3 to 3:1. This invention achieves a synergistic effect by optimizing the ratio of the two active peptides, significantly improving the digestibility and absorption rate of the composition in the pet's gastrointestinal tract. It can effectively improve pet fecal shape, increase calcium absorption, improve blood health indicators, and enhance coat shine. It is suitable for preparing pet food, health supplements, or feed.

Description

Technical Field

[0001] This invention relates to the field of pet food development technology, specifically to a milk protein peptide composition that promotes digestion and absorption in pets and its application. Background Technology

[0002] In the field of pet nutrition and feed technology, protein is the fundamental substance for maintaining pets' life activities and tissue structure. Milk protein, due to its balanced amino acid profile, is often used as a high-quality protein source in pet food. Bioactive peptides derived from the enzymatic hydrolysis of milk protein, such as casein phosphopeptides and casein calcium peptides, have been proven to have certain physiological regulatory functions. However, current technologies mostly focus on the application of single bioactive peptides or simple mixtures, lacking research on optimized formulations tailored to the specific enzymatic hydrolysis environment of pets' gastrointestinal tract. The digestibility and absorption rates of existing single milk-derived bioactive peptides or conventional formulations in pets' gastrointestinal tract still have room for improvement, and their effect on promoting calcium absorption is not fully realized, leading to problems such as poor fecal shape and low nutrient utilization in actual feeding. Therefore, there is an urgent need to develop a milk protein peptide composition that can adapt to the pet's gastrointestinal environment and has synergistic effects in promoting digestion and calcium absorption. Summary of the Invention

[0003] The purpose of this invention is to provide a milk protein peptide composition that promotes digestion and absorption in pets and its applications. This invention achieves a synergistic effect by optimizing the ratio of two active peptides, significantly improving the digestibility and absorption rate of the composition in the pet's gastrointestinal tract. It effectively improves pet fecal shape, increases calcium absorption, improves blood health indicators, and enhances coat shine. It is suitable for preparing pet food, health supplements, or feed.

[0004] The technical solution of the present invention is as follows: 1. A milk protein peptide composition that promotes digestion and absorption in pets, wherein the milk protein peptide composition comprises casein phosphopeptide and casein calcium peptide; wherein the mass ratio of casein phosphopeptide to casein calcium peptide is 1:3 to 3:1.

[0005] The above-mentioned milk protein peptide composition that promotes digestion and absorption in pets has a mass ratio of casein phosphopeptide to casein calcium peptide of 1:1 to 1:3.

[0006] In the aforementioned milk protein peptide composition that promotes digestion and absorption in pets, the mass ratio of casein phosphopeptide to casein calcium peptide is 1:2.

[0007] The aforementioned milk protein peptide composition that promotes digestion and absorption in pets further includes pet food-grade excipients; the total mass of the casein phosphopeptide and the casein calcium peptide accounts for 1% to 99% of the total mass of the milk protein peptide composition.

[0008] The aforementioned milk protein peptide composition that promotes digestion and absorption in pets includes, among other things, one or more of the following pet food-grade excipients: galactooligosaccharides, oleic acid, vegetable oil, lecithin, vitamins, purified water, glycerol, carrageenan, sodium D-isoascorbate, meat ingredients, and starch ingredients.

[0009] The aforementioned milk protein peptide composition that promotes digestion and absorption in pets may be in the form of powder, liquid, semi-solid, or expanded granules.

[0010] The aforementioned milk protein peptide composition that promotes digestion and absorption in pets, when the dosage form is a liquid preparation, further includes vegetable oil and glycerol; when the dosage form is a semi-solid preparation, further includes beef and carrageenan; and when the dosage form is puffed granules, further includes chicken and sweet potato starch.

[0011] The application of a milk protein peptide composition as described above that promotes digestion and absorption in pets in the preparation of pet food, pet health products or pet feed.

[0012] The above-mentioned application refers to its use in the preparation of products that improve the shape of pet feces, enhance calcium absorption, improve blood health indicators, or increase hair shine.

[0013] In the aforementioned applications, the milk protein peptide composition having the effect of promoting digestion and absorption in pets is added in the pet food, pet health products or pet feed at an amount of 1 mg / g to 2 mg / g, or at a mass percentage of 1% to 2%.

[0014] Compared with existing technologies, this invention is composed of casein phosphopeptide (CPP) and casein calcium peptide (CCP). Through the synergistic chelation of intestinal calcium ions by CPP and CCP, the gastrointestinal digestibility and absorption rate are improved, thereby promoting digestion and absorption in pets and enhancing calcium absorption. Its mechanism of action is as follows: casein phosphopeptide is rich in phosphoserine residues, which can effectively bind calcium ions and prevent their precipitation in the intestinal pH environment; while casein calcium peptide provides additional calcium binding sites and a suitable peptide chain length. At a specific ratio, the two form a more stable soluble calcium-peptide complex system, significantly improving the digestive stability and absorption efficiency of the complex in a simulated gastrointestinal environment. This synergistic effect not only significantly improves the in vitro simulated digestibility but also translates into substantial physiological benefits in pets, including significantly improved stool consistency, increased apparent calcium absorption, optimized blood immune-related indicators, and improved coat shine. This invention fills the technological gap in pet-specific compound active peptide digestive aid products and provides a scientific basis and technical support for the development of high-efficiency pet nutritional supplements and functional feeds. Furthermore, the mass ratio of casein phosphopeptide to casein calcium peptide is 1:2. Under this ratio, CPP and CCP form a stable and soluble calcium-peptide complex, achieving peak digestibility and optimal synergistic effect in promoting calcium absorption. Attached Figure Description

[0015] Figure 1 These are comparative images of cat feces morphology before and after feeding with the compound peptide protein powder according to an embodiment of the present invention; wherein, (a) is before feeding and (b) is after feeding. Figure 2 This is a comparison chart of the digestibility and absorption rate of calcium complex peptides in pet cats according to embodiments of the present invention; Figure 3 This is a comparison chart of the digestibility and absorption rate of calcium complex peptides in pet dogs according to an embodiment of the present invention. Detailed Implementation The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0016] Example 1: This example provides a milk protein peptide composition that promotes digestion and absorption in pets, comprising: casein phosphopeptide and casein calopeptide; wherein the mass ratio of casein phosphopeptide to casein calopeptide is 1:3 to 3:1. Specifically, to verify the effect of different ratios within this mass ratio range on digestibility and absorption performance, this example sets up five parallel experimental groups, accurately weighing and mixing casein phosphopeptide powder and casein calopeptide powder at mass ratios of 3:1, 2:1, 1:1, 1:2, and 1:3 respectively. Each mixture is dissolved in purified water to prepare a test solution with a concentration of 10 mg / mL for subsequent in vitro digestion evaluation experiments. It should be noted that this example is only used to verify the ratio of the core active components, and the resulting composition is a pure active peptide mixture, without any pet food-grade excipients or specific dosage form carriers. However, this does not mean that the present invention excludes the possibility of adding excipients or preparing specific formulations in other examples.

[0017] To scientifically evaluate the digestibility of the above composition, this embodiment uses an in vitro simulated gastrointestinal digestion model for testing. This testing method can objectively reflect the degradation and absorption potential of the composition in the pet's gastrointestinal environment. The specific experimental steps are as follows: Step S1, Gastric Digestion Simulation. A phosphate-buffered saline (PBS) solution with a pH of 3.0 was prepared as the basal gastric juice. Pepsin was added to this solution to prepare a gastric digestion solution with a pepsin concentration of 10 mg / mL. The complex peptide solutions of the aforementioned proportions were mixed with the gastric digestion solution at a 1:1 volume ratio. After thorough mixing, the mixture was placed in a constant-temperature shaker and stirred at 120 rpm for 1 hour at 37°C. After the reaction was completed, the pH of the system was immediately adjusted to 7.0 using a 1 mol / L sodium hydroxide solution to terminate pepsin activity, yielding the gastric digestion product for later use.

[0018] Step S2, simulated intestinal digestion. Prepare a simulated small intestinal fluid by adding trypsin and bile salts to PBS with a pH of 7.0. Mix the inactivated gastric digestion product obtained in step S100 with the simulated small intestinal fluid at a 1:1 volume ratio and continue stirring at 37°C and 120 rpm for 2 hours. After the reaction is complete, immediately boil the mixture for 5 minutes to completely inactivate the enzymes, obtaining the final digestive solution.

[0019] Step S3, Digestibility Determination and Calculation. The Kjeldahl nitrogen determination method is used to determine the nitrogen percentage N1 and its volume in the undigested raw material mixture, and the soluble nitrogen percentage N2 and its volume in the final digestate obtained in step S2. The digestibility is calculated using the following formula: ; It should be understood that this formula is a standard calculation method based on the principle of nitrogen balance, used to characterize the proportion of proteins or peptides that are converted into absorbable small molecules in a simulated digestive environment.

[0020] The results of in vitro simulated digestibility tests of different proportions of the composition are shown in Table 1.

[0021] Table 1 Digestibility (100%) 90.12±0.58 91.32±0.44 91.52±0.34 94.83±0.81* 92.11±1.22 Note: * indicates a significant difference compared to other groups (P<0.05).

[0022] As shown in Table 1, within the mass ratio range of 1:3 to 3:1 specified in this invention, the digestibility of all compositions remained above 90%, indicating that the combination of casein phosphopeptide and casein calopeptide within this range exhibited good digestibility. However, when the mass ratio of casein phosphopeptide to casein calopeptide was 1:1 to 1:3, the digestibility further increased and stabilized at a high level. In particular, when the mass ratio of casein phosphopeptide to casein calopeptide was 1:2, the digestibility reached 94.83% ± 0.81%, significantly higher than other ratio groups (P < 0.05).

[0023] This nonlinear synergistic effect may originate from the intermolecular interaction mechanism between the two peptides at a specific ratio. Casein phosphopeptide is rich in phosphoserine residues, which can effectively chelate calcium ions and prevent them from forming insoluble precipitates in the neutral pH environment of the intestine; while casein calcium peptide itself has a high calcium-binding affinity and a suitable peptide chain length. When the two coexist in a 1:2 ratio, a more spatially stable soluble calcium-peptide complex system may be formed, which avoids the competitive inhibition caused by an excess of single casein phosphopeptide and overcomes the problem of insufficient stability of single casein calcium peptide in the acidic gastric environment, thus exhibiting optimal enzymatic hydrolysis efficiency and solubility during the overall digestion process. Therefore, 1:2 has been determined as the optimal mass ratio of this invention.

[0024] Example 2: Based on the casein phosphopeptide and casein calopeptide complex obtained in Example 1, this example further provides a milk protein peptide composition containing pet food-grade additives. Specifically, the total mass of casein phosphopeptide and casein calopeptide in this composition accounts for 1% to 99% of the total mass of the milk protein peptide composition. This broad content range is designed to meet the needs of different application scenarios: when the content is close to the upper limit, the product can be used as a high-concentration nutritional supplement or premix, facilitating subsequent dilution or compounding; when the content is close to the lower limit, it can be directly used as a functional additive in regular pet food or snacks, ensuring digestive efficacy while considering cost and palatability. By introducing pet food-grade additives, not only are processing problems such as easy moisture absorption and clumping of pure peptide powder and poor flowability solved, but the palatability and stability of the product can also be effectively improved, making it easier for industrial production and end-use applications.

[0025] In this embodiment, pet food-grade excipients include one or more of the following: galactooligosaccharides, oleic acid, vegetable oil, lecithin, vitamins, purified water, glycerol, carrageenan, sodium D-isoascorbate, meat ingredients, and starch-based ingredients. It should be understood that the open-ended expression "one or more" implies that in actual production, the combination of excipients can be flexibly selected according to the form and functional requirements of the target product, rather than necessarily including all of the above components simultaneously. For example, galactooligosaccharides, as prebiotics, can synergistically regulate intestinal flora with bioactive peptides; oleic acid, vegetable oil, and lecithin mainly play emulsifying and lipid carrier roles, aiding in the absorption of fat-soluble nutrients and improving palatability; vitamins provide necessary micronutrient support; purified water and glycerol act as solvents and humectants, respectively, maintaining the system's water activity and texture stability; carrageenan, as a natural gelling agent, is suitable for semi-solid molding; sodium D-isoascorbate is used to prevent oxidative deterioration; and meat ingredients and starch-based ingredients are key components for constructing the basic matrix of pet food and improving palatability. This diverse excipient system ensures that the composition of this invention is compatible with various product forms such as powders, liquid formulations, semi-solid formulations, and expanded granules, without limiting the scope of protection due to excipient restrictions. It should be noted that this embodiment only limits the formulation composition and the range of possible components, and does not involve specific dosage form preparation process parameters; the relevant preparation methods will be detailed in subsequent embodiments.

[0026] Example 3: This example further provides multiple product forms of the above-mentioned milk protein peptide composition, wherein the dosage forms of the milk protein peptide composition include powder, liquid formulation, semi-solid formulation, or expanded granules. This multi-dosage form design is designed to adapt to the diverse needs of pet feeding scenarios, providing suitable carrier forms whether it is used as nutritional fortification of daily staple food, treat rewards, or targeted nutritional supplements. It should be emphasized that, regardless of the dosage form used, the active core that promotes digestion and absorption is the casein phosphopeptide and casein calopeptide complex screened and determined in Example 1. The selection of dosage form and matrix mainly serves to protect the stability of active ingredients, improve palatability, and ensure the feasibility of industrial production.

[0027] Specifically, when the dosage form is a liquid formulation, the milk protein peptide composition also includes vegetable oil and glycerol. For example, in the preparation of pet nutritional drops, a matrix system comprising galacto-oligosaccharides, oleic acid, vegetable oil, lecithin, vitamins, purified water, and glycerol can be used. Vegetable oil and glycerol constitute the core framework of the liquid carrier. Vegetable oil not only acts as a solvent for fat-soluble nutrients but also forms a hydrophobic protective layer on the droplet surface, reducing direct contact between the active peptides and the external environment. Glycerol acts as a humectant and thickener, regulating the viscosity and water activity of the system and preventing sedimentation and stratification. In this liquid formulation, the amount of the composite peptide powder obtained in Example 1 is typically 1% to 2% by mass. The product, when sealed, protected from light, and stored at low temperatures, maintains a long shelf life and is easy to feed precisely by dropper.

[0028] When the dosage form is a semi-solid preparation, the milk protein peptide composition also includes beef and carrageenan. Taking pet food as an example, its basic formula typically contains a high proportion of meat ingredients (such as beef, accounting for about 60%-80%) and carrageenan as a gelling agent (accounting for about 0.5%-1.2%), and may also be supplemented with sodium D-isoascorbate as an antioxidant and an appropriate amount of water. Beef provides a high-quality source of animal protein and natural flavor, while carrageenan forms a stable three-dimensional network structure during heat processing, giving the product good texture and water retention. In this semi-solid preparation, the amount of complex peptide added is preferably 1 mg / g to 2 mg / g. During the preparation process, after the minced meat, carrageenan, water and antioxidant are mixed evenly and degassed under vacuum, sterilization is required at 70-90℃. This temperature range can effectively kill pathogenic bacteria while minimizing the damage of high temperature to the active peptide structure, ensuring the retention of bioactivity in the final product.

[0029] When the dosage form is extruded pellets, the milk protein peptide composition also includes chicken and sweet potato starch. In the production of dry pet food, chicken (including chilled chicken and dehydrated chicken meal) serves as the main protein source, and sweet potato starch as the starchy carbohydrate source, together forming the basic matrix of the extruded pellets. In addition, the formula may also include various nutrients such as fish meal, chicken fat, peas, and egg yolk powder to balance the diet. The amount of complex peptides added to the extruded pellets is also controlled within the range of 1 mg / g to 2 mg / g. The production process typically covers standard procedures such as raw material preparation, mixing, extrusion puffing, drying, oil spraying, flavoring, and screening and packaging. It should be understood that although this embodiment lists three specific forms—drops, canned food, and extruded pellets—and their corresponding matrices, this is not an exhaustive limitation on the dosage forms of the present invention. In practical applications, those skilled in the art can also formulate the composition into other forms such as powder premixes, chewable tablets, and freeze-dried blocks as needed.

[0030] Example 4: This example provides the application of a milk protein peptide composition with digestive and absorptive-promoting effects in pets, as described in the preceding examples, in the preparation of pet food, pet health products, or pet feed. It should be specifically noted that the application scenario verified in this example refers specifically to the use of this composition as a functional nutritional additive in the manufacturing process of pet products, aiming to improve the digestive and absorptive functions and overall health of pets through nutritional regulation, rather than for the diagnosis or treatment of diseases. In this application, the amount of the milk protein peptide composition with digestive and absorptive-promoting effects added to pet food, pet health products, or pet feed is 1 mg / g to 2 mg / g, or 1% to 2% by mass. Specifically, this addition range is an effective window derived from extensive preliminary experimental optimization: when the addition amount is below the lower limit, the concentration of the active peptide in the gastrointestinal tract is insufficient to form a stable calcium-peptide complex system, and the digestive-promoting effect is not significant; while when the addition amount is above the upper limit, the marginal benefit diminishes and may increase the metabolic burden. In actual feeding verification, the recommended daily intake of this composition for adult cats is approximately 1 g / day; for adult beagles, the recommended daily intake is approximately 2 g / day. When this dosage is converted to a regular pet food or supplement matrix, its concentration falls exactly within the range of 1 mg / g to 2 mg / g or 1% to 2%, thus ensuring stable expression of efficacy in vivo.

[0031] Furthermore, this application extends to the preparation of products that improve pet fecal morphology, enhance calcium absorption, improve blood health indicators, or increase coat shine. To verify these multi-dimensional technical effects, a rigorous animal feeding trial was designed in this embodiment. Twelve healthy cats and twelve beagles aged 12 to 24 months (half male, half female) were randomly divided into a control group and an active peptide group. The control group was fed commercially available food, while the active peptide group was fed the same commercial food supplemented with the aforementioned dosage of the compound peptide powder (CPP:CCP=1:2) prepared in Example 1 of this invention. The trial lasted for three weeks, with the ambient temperature controlled at 20-25℃, relative humidity at 40%-60%, 12-hour light-dark alternation daily, free access to water throughout, and a well-ventilated and hygienic environment. After the trial, fecal morphology, blood biochemical indicators, coat shine, and calcium absorption rate were comprehensively measured and analyzed.

[0032] In terms of improving the shape of pet feces, such as Figure 1 As shown, before feeding, the cats' feces were mostly mixed excrement, containing dark brown soft stools and a large amount of undigested light-colored pellets. The stools were loose and irregularly shaped, indicating incomplete digestion and absorption. After feeding the same batch of cats with a diet containing the composition of this invention for three weeks, the feces of the same batch of cats transformed into several independent dark brown short cylindrical or lumpy pieces. The surface was relatively dry, the structure was compact and well-formed, and there were no obvious scattered undigested pellets. This significant change in macroscopic morphology directly reflects that the composition of this invention can effectively promote the decomposition and absorption of nutrients in the intestines, reduce the excretion of soft stools and residues caused by indigestion, and thus improve intestinal health.

[0033] Tables 2 and 3 show the blood routine test results for pet cats and beagles, respectively, regarding improvements in blood health indicators.

[0034] Table 2 Total white blood cell count 2.87-17.02 13.19 10.17 neutrophils 2.30-10.29 6.98 5.23 Lymphocytes* 0.92-6.88 7.614 4.11 macrophages 0.05-0.67 0.54 0.25 Eosinophil count 0.17-1.57 1.23 0.58 basophils 0.01-0.26 0.19 0.11 Table 3 Total white blood cell count 2.87-17.02 11.24 11.57 neutrophils 2.30-10.29 8.94 4.65 lymphocytes 0.92-6.88 6.88 5.21 macrophages 0.05-0.67 0.23 0.35 Eosinophil count 0.17-1.57 1.02 0.88 basophils 0.01-0.26 0.14 0.16 Data showed that the lymphocyte count of the control group of pet cats was 7.61 × 10⁻⁶. 9 / L, exceeding 0.92-6.88×10 9 The normal reference range for 4.11 × 10⁹ / L suggests that the body may have chronic inflammatory stress or immune dysregulation; while the lymphocyte count in the active peptide group decreased to 4.11 × 10⁹ / L. 9 / L, completely returning to the normal range, and the difference was significant. Similarly, in the beagle dog experiment, key immune indicators such as neutrophils and lymphocytes in the active peptide group were closer to the ideal physiological range than those in the control group. This indicates that the composition of the present invention not only promotes digestion, but also indirectly regulates the body's immune homeostasis by optimizing nutrient absorption efficiency, thereby maintaining blood health indicators at a better level.

[0035] To improve coat shine, a colorimeter was used to perform quantitative analysis on the coat of pet dogs, and the results are shown in Table 4.

[0036] Table 4

[0037] After 21 days of feeding, the L-value (brightness) of the coat of the dogs in the active peptide group significantly increased from the initial 71.93±6.80 to 86.43±2.43, showing a statistically significant difference compared to the control group (P<0.05). In contrast, the L-value of the control group did not change significantly before and after the experiment. Coat brightness is an external indicator of a pet's protein nutritional status and trace element absorption efficiency. The significant increase in the L-value further confirms that the composition of this invention effectively improves the coat quality and appearance of pets by promoting the synergistic absorption of amino acids and minerals.

[0038] To improve calcium absorption, this embodiment uses the Kjeldahl method combined with colorimetric method to determine calcium content, and calculates the apparent digestibility and absorption rate of calcium according to the following formula: ; In the formula, N1 represents the total calcium content in ingested feed; N2 represents the calcium content excreted in feces; and N3 represents the calcium content excreted in urine. This formula, based on the principle of conservation of mass, deducts the double loss from feces and urine, and accurately reflects the body's actual net absorption ratio of calcium. Figure 2 and Figure 3 As shown, the calcium absorption rate of the active peptide group was significantly higher than that of the control group in both cats and dogs. Specifically, the calcium absorption rate of the active peptide group in cats reached 30.9%, significantly better than the 25.2% of the control group; the active peptide group in dogs reached 31.4%, also significantly higher than the 26.2% of the control group. This result strongly demonstrates that the complex system formed by casein phosphopeptide and casein calcium peptide in a 1:2 ratio can effectively chelate calcium ions in the pet's gastrointestinal tract and prevent their precipitation, thereby significantly improving calcium bioavailability. In summary, this embodiment, through multi-dimensional in vivo empirical studies, fully verifies the application value of the composition of the present invention in the preparation of pet food and health products and its comprehensive efficacy in improving fecal, blood, hair, and calcium absorption.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A milk protein peptide composition that promotes digestion and absorption in pets, characterized in that, The milk protein peptide composition comprises casein phosphopeptide and casein calopeptide; wherein the mass ratio of casein phosphopeptide to casein calopeptide is 1:3 to 3:

1.

2. The milk protein peptide composition with the function of promoting digestion and absorption in pets according to claim 1, characterized in that, The mass ratio of casein phosphopeptide to casein calopeptide is 1:1 to 1:

3.

3. The milk protein peptide composition with the function of promoting digestion and absorption in pets according to claim 2, characterized in that, The mass ratio of casein phosphopeptide to casein calcipopeptide is 1:

2.

4. The milk protein peptide composition with the function of promoting digestion and absorption in pets according to claim 1, characterized in that, The milk protein peptide composition also includes pet food grade additives; the total mass of the casein phosphopeptide and the casein calcium peptide accounts for 1% to 99% of the total mass of the milk protein peptide composition.

5. The milk protein peptide composition with the function of promoting digestion and absorption in pets according to claim 4, characterized in that, The pet food-grade additives include one or more of the following: galactooligosaccharides, oleic acid, vegetable oil, lecithin, vitamins, purified water, glycerol, carrageenan, sodium D-isoascorbate, meat ingredients, and starch-based ingredients.

6. The milk protein peptide composition with the function of promoting digestion and absorption in pets according to claim 1, characterized in that, The dosage forms of the milk protein peptide composition include powder, liquid formulation, semi-solid formulation, or expanded granules.

7. The milk protein peptide composition with the function of promoting digestion and absorption in pets according to claim 6, characterized in that, When the dosage form is a liquid preparation, the milk protein peptide composition further includes vegetable oil and glycerol; when the dosage form is a semi-solid preparation, the milk protein peptide composition further includes beef and carrageenan; when the dosage form is puffed granules, the milk protein peptide composition further includes chicken and sweet potato starch.

8. The use of a milk protein peptide composition having the effect of promoting digestion and absorption in pets as described in any one of claims 1 to 7 in the preparation of pet food, pet health products or pet feed.

9. The application according to claim 8, characterized in that, The application is in the preparation of products that improve the shape of pet feces, increase calcium absorption, improve blood health indicators, or enhance hair shine.

10. The application according to claim 8, characterized in that, The milk protein peptide composition that promotes digestion and absorption in pets is added in the pet food, pet health product or pet feed at an amount of 1 mg / g to 2 mg / g, or at a mass percentage of 1% to 2%.

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