3A fatty acid pet food capable of improving immunity of young dogs and cats and preparation method of 3A fatty acid pet food

Abstract

The invention provides 3A fatty acid pet food capable of improving immunity of young dogs and cats and a preparation method of the 3A fatty acid pet food, and belongs to the technical field of pet food. Firstly, the 3A fatty acid pet food capable of improving immunity of young dogs and cats is provided, the 3A fatty acid pet food comprises the following components: chicken meal, sweet potato flour, potato flour, chicken oil, chicken livers, mineral substances, multivitamins, cellulose, linseed oil, ARA oil and DHA algal oil, the content of ALA in the 3A fatty acid pet food is 0.15-0.60%, the content of ARA is 0.15-0.60%, the content of DHA is 0.15-0.60%, it is guaranteed that the 3A fatty acid pet food contains three kinds of fatty acids of ALA, ARA and DHA, and meanwhile, the content of DHA in the 3A fatty acid pet food can be improved. The contents of three fatty acids, namely ALA, ARA and DHA, are balanced, so that the immunity of the pets is improved; and secondly, the invention further provides a preparation method of the adaptive 3A fatty acid pet food, so that the stable quality of the prepared pet food is ensured, and batch and large-scale production can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of pet food and its preparation method, especially to a kind of 3A fatty acid pet food that can improve the immunity of young dogs and cats and its preparation method, belong to the technical field of pet food. BACKGROUND

[0002] Lipids in the diet have two main functions: providing energy source for the body and providing essential fatty acids, and all mammals need essential fats to form cell membranes in the body, essential fatty acids and many aspects of body health are closely related, including immune function, hair and skin, kidney function, etc. In general, the main functions of essential fatty acids in the body are as follows: participating in the synthesis of phospholipids, existing in the form of phospholipids in mitochondrial membranes, cell membranes and plasma membranes, etc. Biological membranes; reduce blood cholesterol levels; synthesis of important bioactive substances in the body, such as precursors of hormones such as prostaglandins. There are mainly two types of essential fatty acids, n-6 and n-3, such as linoleic acid, gamma-linolenic acid, arachidonic acid (ARA) of n-6 type, alpha-linolenic acid (ALA), eicosapentaenoic acid, docosahexaenoic acid (DHA) of n-3 type, etc.

[0003] It is well known that polyunsaturated fatty acids (PUFA) play a key role in the normal growth and development of newborns in all mammalian species, and also have been disclosed to improve the immunity of dogs and cats, anti-inflammatory effects, etc. Existing research shows that adding appropriate essential fatty acids to the feed can promote the increase of antibody quantity and enhance the ability of humoral immune response. The immune response of the animal body will be significantly reduced if the essential fatty acids are lacking in the feed, and the content of immunoglobulin M (IgM) and immunoglobulin G (IgG) in the blood will also be relatively reduced. However, when the essential fatty acids exceed the required amount, the immunity of the animal cannot be further improved, but an immune suppression phenomenon occurs, such as: cats cannot maintain the essential fatty acid level in the body by supplementing a large amount of linolenic acid, because high content of linolenic acid in the diet will prevent linoleic acid from being converted into arachidonic acid, and the ability of linoleic acid to be converted into arachidonic acid in the cat liver is already quite limited, so excessive linolenic acid will lead to a deficiency of arachidonic acid, and thus the content of corresponding fatty acids cannot be balanced, resulting in a decrease in the immune response of the cat body. In addition, for young dogs and cats, on the one hand, the immunity of young dogs and cats is weaker than that of adult dogs and cats; on the other hand, young dogs and cats have a poorer ability to balance the types and contents of fatty acids in the body; Although the prior art CN101321477A discloses "fatty acid salt and its preparation and use method", CN102131502A discloses "nutritional composition for improving immune system of mammals", CN102164595A discloses "immune system nutritional support in anticancer treatment", and CN113925170A discloses "a bean-based formula powder with anti-fatigue and immune function improvement and its preparation method", etc., but they all do not solve the balance problem of the types and contents of fatty acids in the bodies of young dogs and cats.

[0004] Therefore, there is a need for a pet food that can balance the types and contents of fatty acids, especially a pet food that can improve the immunity of young dogs and cats. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provides a 3A fatty acid pet food that can improve the immunity of young dogs and cats and its preparation method. In this technical solution, a functional feed is provided, which contains ALA, ARA and DHA (referred to as "3A fatty acid") to improve the immunity of pets, especially young cats and dogs; in addition, a suitable preparation method is provided to ensure the quality stability of the prepared young pet food and enable batch and large-scale production.

[0006] In order to achieve the above technical purpose, the following technical solution is proposed: The first purpose of the present application is to provide a 3A fatty acid pet food that can improve the immunity of young dogs and cats, which comprises the following components: chicken meal, sweet potato meal, potato meal, chicken oil, chicken liver, minerals, vitamins, cellulose, flaxseed oil, ARA oil and DHA algal oil; The ALA content in the young pet food that can improve immunity is 0.15-0.60%, the ARA content is 0.15-0.60%, and the DHA content is 0.15-0.60%; The chicken meal is directly purchased, wherein the crude protein content is ≥72%, the ALA content is <1%, and it does not contain ARA and DHA; the fineness is 30-40 mesh; The sweet potato meal is directly purchased, wherein the fineness is 40-50 mesh; the amylose content is 20%, and the amylopectin content is 50%; The potato meal is directly purchased, wherein the fineness is 60-70 mesh; the amylose content is 15%, and the amylopectin content is 56%; The beef meal is directly purchased, wherein the fineness is 20-30 mesh, the crude protein content is ≥68%, the ALA content is <1%, and it does not contain ARA and DHA; The chicken oil is directly purchased, which is pure chicken fat; the ALA content is <2%, and it does not contain ARA and DHA; Chicken liver powder: directly purchased as pure chicken liver powder; wherein the fineness is 80-100 mesh; Minerals: the main elements are iron, copper, manganese, zinc, selenium and iodine, which are directly purchased and have a fineness of 60-70 mesh; Compound vitamins: including vitamin A acetate, vitamin B1, vitamin B2, vitamin B6, vitamin B 12 , vitamin D3, DL-calcium pantothenate, D-biotin, folic acid, nicotinamide, D-pantothenic acid calcium, DL-α-tocopherol acetate and sodium bisulfite menadione; Flaxseed oil: directly purchased, with an ALA content (calculated as C 22 H 32 O2 triglyceride) of 45.0-50.0% and a linoleic acid content (calculated as C 20 H 30 O2 triglyceride) of <20%; ARA oil: directly purchased, with an ARA content (calculated as C 22 H 32 O2 triglyceride) of 40.0-45.0%; DHA algal oil: directly purchased, with a DHA content (calculated as C 22 H 32 O2 triglyceride) of 40.0-45.0% and an EPA content (calculated as C 20 H 30 O2 triglyceride) of <0.8%.

[0007] Further, the pet food is a young dog food, which comprises the following components in parts by weight: chicken powder 60-70 parts, sweet potato powder 60-80 parts, potato powder 40-60 parts, beef powder 30-40 parts, chicken oil 30-40 parts, chicken liver powder 5-10 parts, chicken liver paste 5-10 parts, minerals 7-12 parts, compound vitamins 6-10 parts, cellulose 1-2 parts, flaxseed oil 0.5-2 parts, ARA oil 0.5-2 parts and DHA algal oil 0.5-4 parts.

[0008] Further, the pet food is a young dog food, which comprises the following components in parts by weight: chicken powder 60-70 parts, sweet potato powder 60-80 parts, potato powder 40-60 parts, beef powder 30-40 parts, chicken oil 30-40 parts, chicken liver powder 5-10 parts, chicken liver paste 5-10 parts, minerals 7-12 parts, compound vitamins 6-10 parts, cellulose 1-2 parts, flaxseed oil 0.5-2 parts, ARA oil 0.5-4 parts and DHA algal oil 0.5-2 parts.

[0009] Further, the pet food is a young cat food, which comprises the following components in parts by weight: chicken powder 120-160 parts, sweet potato powder 30-50 parts, potato powder 20-40 parts, chicken oil 30-40 parts, chicken liver powder 5-10 parts, chicken liver paste 5-10 parts, mineral 8-12 parts, compound vitamin 5-10 parts, taurine 0.5-1 part, cellulose 1-2 parts, flaxseed oil 1-3 parts, ARA oil 1-3 parts, and DHA algal oil 2-5 parts.

[0010] Further, the pet food is a young cat food, which comprises the following components in parts by weight: chicken powder 120-160 parts, sweet potato powder 30-50 parts, potato powder 20-40 parts, chicken oil 30-40 parts, chicken liver powder 5-10 parts, chicken liver paste 5-10 parts, mineral 8-12 parts, compound vitamin 5-10 parts, taurine 0.5-1 part, cellulose 1-2 parts, flaxseed oil 1-3 parts, ARA oil 2-5 parts, and DHA algal oil 1-3 parts.

[0011] The second object of the present technical solution is to provide a preparation method of 3A fatty acid pet food capable of improving the immunity of young dogs and cats, which comprises the following steps: S1 feeding: after the chicken powder, sweet potato powder, potato powder and / or beef powder are screened to remove impurities, they are fed into the corresponding large material bin, and the mineral, compound vitamin, cellulose and / or taurine are fed into the corresponding small material bin; S2 first mixing: the materials in step S1 are weighed according to the formula and then fed into the mixing bin I for uniform mixing; S3 crushing: the mixture obtained in step S2 is fed into a coarse crusher (using a 4mm screen piece) to crush to a particle size of 600-700μm, and then fed into a fine crusher (using a 0.8mm screen piece) to crush to a particle size of 200-300μm; S4 screening: the fine crushed material obtained in step S3 is fed into a screening device to remove impurities; S5 second mixing: the screened material obtained in step S4 is fed into the mixing bin II for uniform mixing, and the mixing is performed for 2min at a time of 1 ton; S6 conditioning and bulking: the mixture obtained in step S5 is fed into a conditioner at a feeding speed of 4000-47000 kg / h with water addition of 540-630 kg / h; then, it is fed into a bulking machine, and the temperature is controlled at 120-130 DEG C, the cavity pressure is 1.0-1.2 bar, the outlet pressure is 33-40 bar, and the cutter rotating speed is 1000-1400 r / min, and the bulking material with different sizes (diameter 8.5-12.5 mm, thickness 3.5-8.5 mm) and shapes (dog food triangle, cat food plum blossom) is processed by using different shaped molds; S7 drying: the bulking material obtained in step S6 is dried by using a negative pressure air duct and a dryer, and the water content is controlled at 9-11%, and then the bulking material is cooled and fed into a spraying bin to obtain pet food semi-products; S8 spraying: the pet food semi-products are vacuum sprayed; Specifically, the three-layer spraying method is adopted, the first layer is sprayed with chicken oil, linseed oil, ARA oil and DHA algal oil; the second layer is sprayed with chicken liver paste; and the third layer is sprayed with chicken liver powder.

[0012] The flavor and nutrition can be firmly locked, the finished product is not oily and greasy, and the palatability is better. The spraying sequence is to spray oil first, then spray paste, and finally spray powder. If the paste is sprayed first, then the oil is sprayed, or the paste and the oil are mixed and then sprayed, the particle pore size will be blocked, and the oil cannot penetrate into the food. For the oil and the paste, different size nozzles are selected and separated by valves, and the flow and the spraying shape are controlled; the vibration distributor is used to control the powder spraying, and the flow is not interrupted, and the spraying time is about 60 s. After each spraying process, the mixture is stirred for 60 s to ensure that the ingredients fully wrap the surface of the particles; S9 cooling and packaging: the sprayed material obtained in step S8 is placed into a cooler to be cooled; then, it is fed into a finished product bin, and after being sieved by a double-layer sieve (the lower layer is 5 mm, and the upper layer is 10.8 mm), it is packaged according to the set specifications.

[0013] By adopting the technical scheme, the following beneficial technical effects are brought: The functional feed provided by the application ensures that ALA, ARA and DHA are contained in the functional feed, and the content of the three types of fatty acids is balanced, so that the immunity of pets, especially cats and dogs, is improved; in addition, the application provides a suitable preparation method, so that the quality of the prepared pet food is stable, and the pet food can be produced in batches and on a large scale; In addition, the pet food provided by the application can also improve the health of skin and hair, promote heart health, and support joint health. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a process flow chart of the preparation method in Example 2. Figure 2 Layout of the preparation system in Example 4; Figure 3 Effects of "3A fatty acid" on serum antioxidant indexes of dogs in the discussion example (significance level: 0.05); Figure 4 Effects of "3A fatty acid" on serum antioxidant indexes of cats in the discussion example (significance level: 0.05); Figure 5 Effects of "3A fatty acid" on serum immune indexes of dogs in the discussion example (significance level: 0.05); Figure 6 Effects of "3A fatty acid" on serum immune indexes of cats in the discussion example (significance level: 0.05); In the figure, 1, large bin, 2, small bin, 3, mixing bin I, 4, coarse pulverizer, 5, fine pulverizer, 6, screening device, 7, mixing bin II, 8, conditioner, 9, expander, 10, dryer, 11, vacuum spraying device, 11, cooler, 12, feeder, 13, 3A fatty acid pet food storage tank, 14, negative pressure air duct. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be described below in a clear and complete manner. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] In the following examples, the chicken meal, sweet potato meal, potato meal, chicken oil, chicken liver, minerals, complex vitamins, taurine, cellulose, flaxseed oil, ARA oil and DHA algal oil are all commercially available.

[0017] Among them, the chicken meal: crude protein content ≥72%, ALA content <1%, without ARA and DHA; fineness is 30-40 mesh; The sweet potato meal: fineness is 40-50 mesh; amylose content is 20%, amylopectin content is 50%; the selection of this specification of sweet potato meal is helpful for the digestion and absorption of young dogs and cats; The potato meal: fineness is 60-70 mesh; amylose content is 15%, amylopectin content is 56%; the selection of this specification of potato meal is helpful for the digestion and absorption of young dogs and cats; The beef meal: fineness is 20-30 mesh, crude protein content ≥68%, ALA content <1%, without ARA and DHA; The chicken oil: is pure chicken fat; ALA content <2%, without ARA and DHA; Chicken liver powder: pure chicken liver powder; wherein the fineness is 80-100 mesh; Minerals: the main elements are iron, copper, manganese, zinc, selenium and iodine, which are directly purchased and have a fineness of 60-70 mesh. The main elements involved in the minerals include: iron glycinate chelate, copper glycinate chelate, manganese amino acid complex, zinc amino acid complex, and calcium iodate; the guaranteed content of the components is: iron element content is 32,000-160,000 mg / kg, copper element content is 10,500-20,000 mg / kg, manganese element content is 6,400-32,000 mg / kg, zinc element content is 52,500-98,000 mg / kg, and iodine element content is 960-1,440 mg / kg, etc. Compound vitamins: including vitamin A acetate, vitamin B1, vitamin B2, vitamin B6, vitamin B 12 12, D- biotin, folic acid, nicotinamide, D- pantothenic acid calcium, DL- alpha- tocopherol acetate and sodium bisulfite menadione; the guaranteed content (per kilogram) is: vitamin A ≥18000000IU, vitamin D3 ≥1200000IU, vitamin E ≥34000IU, vitamin K3 ≥4g, vitamin B1 ≥5g, vitamin B2 ≥8g, vitamin B6 ≥4g, vitamin B 12 12 ≥40mg, folic acid ≥2g, D- biotin ≥200mg, nicotinamide ≥60g, pantothenic acid ≥20g, etc.

[0018] Flaxseed oil: directly purchased, ALA content (C 22 H 32 O2 triglyceride) 45.0-50.0%, linoleic acid content (C 20 H 30 O2 triglyceride) <20%; ARA oil: directly purchased, ARA content (C 22 H 32 O2 triglyceride) 40.0-45.0%; DHA algal oil: directly purchased, DHA content (C 22 H 32 O2 triglyceride) 40.0-45.0%, EPA content (C 20 H 30 O2 triglyceride) <0.8%.

[0019] Example 1 The present embodiment provides a 3A fatty acid pet food capable of improving the immunity of young dogs, which comprises the following components in mass fraction: Chicken powder 65 parts, sweet potato powder 70 parts, potato powder 50 parts, beef powder 35 parts, chicken oil 35 parts, chicken liver powder 8 parts, chicken liver paste 8 parts, mineral 10 parts, compound vitamin 8 parts, cellulose 1 part, flaxseed oil 1 part, ARA oil 1.5 parts and DHA algal oil 2 parts.

[0020] In the 3A fatty acid pet food, the crude protein content is 25.7%, the crude fat content is 18.5%, the moisture content is 8.8%, the crude fiber content is 2.3%, the crude ash content is 6.8%, the calcium content is 1.0%, the total phosphorus content is 0.8%, the water-soluble chloride (calculated as Cl-) content is 0.6%, the lysine content is 1.3%, the ALA content is 0.17%, the ARA content is 0.22%, and the DHA content is 0.28%.

[0021] Example 2 The present embodiment provides a 3A fatty acid pet food capable of improving the immunity of young dogs, which comprises the following components in mass parts: Chicken powder 60 parts, sweet potato powder 60 parts, potato powder 60 parts, beef powder 30 parts, chicken oil 30 parts, chicken liver powder 5 parts, chicken liver paste 5 parts, mineral 7 parts, compound vitamin 10 parts, cellulose 1.7 parts, flaxseed oil 0.5 parts, ARA oil 2 parts and DHA algal oil 0.5 parts.

[0022] In the 3A fatty acid pet food, the crude protein content is 22.1%, the crude fat content is 17.3%, the moisture content is 8.8%, the crude fiber content is 5.3%, the crude ash content is 6.8%, the calcium content is 1.0%, the total phosphorus content is 0.8%, the water-soluble chloride (calculated as Cl-) content is 0.6%, the lysine content is 1.3%, the ALA content is 0.09%, the ARA content is 0.29%, and the DHA content is 0.07%.

[0023] Example 3 The present embodiment provides a 3A fatty acid pet food capable of improving the immunity of young dogs, which comprises the following components in mass parts: Chicken powder 70 parts, sweet potato powder 80 parts, potato powder 40 parts, beef powder 40 parts, chicken oil 40 parts, chicken liver powder 10 parts, chicken liver paste 10 parts, mineral 12 parts, compound vitamin 6 parts, cellulose 2 parts, flaxseed oil 2 parts, ARA oil 0.5 parts and DHA algal oil 4 parts.

[0024] In the 3A fatty acid pet food, the crude protein content is 28.8%, the crude fat content is 20.1%, the moisture content is 8.8%, the crude fiber content is 1.1%, the crude ash content is 6.8%, the calcium content is 1.0%, the total phosphorus content is 0.8%, the water-soluble chloride (calculated as Cl -The content of crude protein is 33.7%, the content of crude fat is 24.3%, the content of moisture is 8.9%, the content of crude fiber is 4.1%, the content of crude ash is 9.1%, the content of calcium is 1.3%, the content of total phosphorus is 0.6%, the content of water-soluble chloride (calculated as Cl-) is 0.5%, the content of lysine is 2.6%, the content of taurine is 0.36%, the content of ALA is 0.42%, the content of ARA is 0.16%, and the content of DHA is 0.79%.

[0025] Embodiment 4 The 3A fatty acid pet food provided in the embodiment can improve the immunity of young cats and comprises the following components in mass fraction: chicken powder 120 parts, sweet potato powder 50 parts, potato powder 40 parts, chicken oil 30 parts, chicken liver powder 5 parts, chicken liver paste 10 parts, mineral 8 parts, compound vitamin 5 parts, taurine 0.5 parts, cellulose 2 parts, flaxseed oil 3 parts, ARA oil 1 part, and DHA algal oil 5 parts.

[0026] The content of crude protein in the 3A fatty acid pet food is 33.7%, the content of crude fat is 24.3%, the content of moisture is 8.9%, the content of crude fiber is 4.1%, the content of crude ash is 9.1%, the content of calcium is 1.3%, the content of total phosphorus is 0.6%, the content of water-soluble chloride (calculated as Cl-) is 0.5%, the content of lysine is 2.6%, the content of taurine is 0.36%, the content of ALA is 0.42%, the content of ARA is 0.16%, and the content of DHA is 0.79%.

[0027] Embodiment 5 The 3A fatty acid pet food provided in the embodiment can improve the immunity of young cats and comprises the following components in mass fraction: chicken powder 160 parts, sweet potato powder 30 parts, potato powder 20 parts, chicken oil 40 parts, chicken liver powder 10 parts, chicken liver paste 5 parts, mineral 12 parts, compound vitamin 10 parts, taurine 1 part, cellulose 1 part, flaxseed oil 1 part, ARA oil 3 parts, and DHA algal oil 2 parts.

[0028] The content of crude protein in the 3A fatty acid pet food is 43.5%, the content of crude fat is 29.3%, the content of moisture is 7.8%, the content of crude fiber is 2.1%, the content of crude ash is 6.8%, the content of calcium is 1.0%, the content of total phosphorus is 0.8%, the content of water-soluble chloride (calculated as Cl-) is 0.6%, the content of lysine is 1.3%, the content of taurine is 0.36%, the content of ALA is 0.14%, the content of ARA is 0.45%, and the content of DHA is 0.30%.

[0029] Embodiment 6 The 3A fatty acid pet food provided in the embodiment can improve the immunity of young cats and comprises the following components in mass fraction: Chicken powder 140 parts, sweet potato powder 40 parts, potato powder 30 parts, chicken oil 35 parts, chicken liver powder 8 parts, chicken liver paste 7 parts, mineral 10 parts, compound vitamin 7 parts, taurine 0.7 parts, cellulose 1.6 parts, flaxseed oil 2 parts, ARA oil 2 parts and DHA algal oil 4 parts.

[0030] The 3A fatty acid pet food has a crude protein content of 39.0%, a crude fat content of 24.6%, a moisture content of 7.8%, a crude fiber content of 2.1%, a crude ash content of 6.8%, a calcium content of 1.0%, a total phosphorus content of 0.8%, a water-soluble chloride (calculated as Cl-) content of 0.6%, a lysine content of 1.3%, a taurine content of 0.25%, an ALA content of 0.28%, an ARA content of 0.31% and a DHA content of 0.63%.

[0031] Example 7 Based on the examples 1-6, the present example provides a preparation method of the 3A fatty acid pet food capable of improving the immunity of young dogs and cats, as shown in the formula (I) and comprising the following steps: Figure 1 S1 feeding: feeding the chicken powder, sweet potato powder, potato powder and / or beef powder into the corresponding large material bin, and feeding the mineral, compound vitamin, cellulose and / or taurine into the corresponding small material bin; S2 first mixing: weighing the materials of step S1 according to the formula, and then feeding into the mixing bin I for uniform mixing; S3 crushing: passing the mixture obtained in step S2 into a coarse crusher (using a 4 mm screen piece) to crush to a particle size of 600-700 μm, and then passing into a fine crusher (using a 0.8 mm screen piece) to crush to a particle size of 200-300 μm; S4 screening: passing the fine crushed material obtained in step S3 into a screening device to remove impurities; S5 second mixing: passing the screened material obtained in step S4 into the mixing bin II for uniform mixing; S6 conditioning and puffing: using a feeder to feed the mixture obtained in step S5 into a conditioner at a feeding speed of 4000-47000 kg / h, and conditioning with a water addition amount of 540-630 kg / h; then, passing into a puffer to control the temperature at 120-130 ℃, the cavity pressure at 1.0-1.2 bar, the outlet pressure at 33-40 bar and the cutter rotating speed at 1000-1400 r / min to obtain the puffed material; S7 drying: using a negative pressure air duct and a dryer to control the water content of the puffed material obtained in step S6 to 9-11%, and then cooling, passing into a spraying bin to obtain the pet food semi-product; S8 spraying: vacuum spraying the pet food semi-product; S8 spraying: vacuum spraying the pet food semi-product; Specifically, it includes a three-layer spraying method: the first layer is sprayed with chicken oil, flaxseed oil, ARA oil and DHA algal oil; the second layer is sprayed with a paste made from chicken liver (chicken liver paste); and the third layer is sprayed with chicken liver powder. S9 Cooling and Packaging: The spray paint obtained in step S8 is placed in a cooler for cooling; then, it enters the finished product warehouse, is screened by a double-layer sieve, and is packaged according to the set specifications.

[0032] Example 8 Based on Example 7, this example provides a preparation system for 3A fatty acid pet food that can improve the immunity of young dogs and cats, such as... Figure 2 As shown, it includes: Large silo 1, small silo 2, mixing silo I 3, coarse crusher 4, fine crusher 5, screening device 6, mixing silo II 7, conditioner 8, expander 9, dryer 10, vacuum spraying device 11, and cooler 11.

[0033] Among them, the large material bin 1 and the small material bin 2 are located in front of the work station of the large material bin 1. The discharge ports of the large material bin 1 and the small material bin 2 are both connected to the inlet of the mixing bin I 3 through material conveying pipes; the coarse crusher 4 is located behind the work station of the mixing bin I 3. The discharge port of the mixing bin I 3 is connected to the inlet of the coarse crusher 4; the fine crusher 5 is located behind the work station of the coarse crusher 4. The discharge port of the coarse crusher 4 is connected to the inlet of the fine crusher 5. The screening device 6 is located behind the station of the fine pulverizer 5, and the discharge port of the fine pulverizer 5 is connected to the inlet of the screening device 6. Mixing bin II 7 is located behind the work station of screening device 6, and the discharge port of screening device 6 is connected to the inlet of mixing bin II 7. Conditioner 8 is located on the rear side of the mixing silo II 7, and the discharge port of mixing silo II 7 is connected to conditioner 8 through feeder 12. The extruder 9 is located behind the station of the conditioner 8, and the outlet of the conditioner 8 is connected to the inlet of the extruder 9. The dryer 10 is located behind the work station of the expander 9. The outlet of the expander 9 is connected to the inlet of the dryer 10. The dryer 10 is connected to a negative pressure air duct 14. The vacuum spraying device 11 is located at the rear of the work station of the dryer 10, and the discharge port of the dryer 10 is connected to the inlet of the vacuum spraying device 11. The vacuum spraying device 11 is connected to a cooler 11, and the cooler 11 is connected to a 3A fatty acid pet food storage tank 13. A continuous pathway for the preparation of 3A fatty acid pet food is formed between the large feed silo 1, small feed silo 2, mixing silo I 3, coarse crusher 4, fine crusher 5, screening device 6, mixing silo II 7, conditioner 8, expander 9, dryer 10, vacuum spraying device 11, cooler 11, and 3A fatty acid pet food storage tank 13.

[0034] Discussion Example Based on the examples 1-6, the following 10 formulations are provided in this discussion example to discuss the effect of components in the formulations on young dogs and young cats.

[0035] I. Formulations of young dog food Formulation 1 (ALA): chicken meal 65 parts, sweet potato meal 80 parts, potato meal 40 parts, beef meal 40 parts, chicken oil 30 parts, chicken liver paste 8 parts, chicken liver meal 8 parts, minerals 7 parts, cellulose 1 part, compound vitamin 8 parts, and flaxseed oil 1 part; Formulation 2 (ALA+ARA): chicken meal 65 parts, sweet potato meal 80 parts, potato meal 40 parts, beef meal 40 parts, chicken oil 30 parts, chicken liver paste 8 parts, chicken liver meal 8 parts, minerals 7 parts, cellulose 1 part, compound vitamin 8 parts, flaxseed oil 1 part, and ARA oil 1 part; Formulation 3 (ALA+DHA+ARA-1): chicken meal 65 parts, sweet potato meal 80 parts, potato meal 40 parts, beef meal 40 parts, chicken oil 30 parts, chicken liver paste 8 parts, chicken liver meal 8 parts, minerals 7 parts, cellulose 1 part, compound vitamin 8 parts, flaxseed oil 1 part, ARA oil 1 part, and DHA oil 1 part; Formulation 4 (ALA+DHA+ARA-2): chicken meal 65 parts, sweet potato meal 80 parts, potato meal 40 parts, beef meal 40 parts, chicken oil 30 parts, chicken liver paste 8 parts, chicken liver meal 8 parts, minerals 7 parts, cellulose 1 part, compound vitamin 8 parts, flaxseed oil 1 part, ARA oil 1 part, and DHA oil 1.5 parts; Formulation 5 (ALA+DHA+ARA-3): chicken meal 65 parts, sweet potato meal 80 parts, potato meal 40 parts, beef meal 40 parts, chicken oil 30 parts, chicken liver paste 8 parts, chicken liver meal 8 parts, minerals 7 parts, cellulose 1 part, compound vitamin 8 parts, flaxseed oil 1 part, ARA oil 1.5 parts, and DHA oil 1 part; II. Formulations of young cat food Formulation 6 (ALA): chicken meal 145 parts, sweet potato meal 35 parts, potato meal 30 parts, chicken oil 30 parts, chicken liver paste 18 parts, chicken liver meal 18 parts, minerals 8 parts, taurine 0.7 parts, cellulose 1 part, compound vitamin 8 parts, and flaxseed oil 1.5 parts; Formulation 7 (ALA+ARA): chicken meal 145 parts, sweet potato meal 35 parts, potato meal 30 parts, chicken oil 30 parts, chicken liver paste 18 parts, chicken liver meal 18 parts, minerals 8 parts, taurine 0.7 parts, cellulose 1 part, compound vitamin 8 parts, flaxseed oil 1.5 parts, and ARA oil 1.5 parts; Formulation 8 (ALA+DHA+ARA-1): chicken meal 145 parts, sweet potato meal 35 parts, potato meal 30 parts, chicken oil 30 parts, chicken liver paste 18 parts, chicken liver meal 18 parts, minerals 8 parts, taurine 0.7 parts, cellulose 1 part, complex vitamins 8 parts, flaxseed oil 1.5 parts, ARA oil 1.5 parts, and DHA oil 1.5 parts; Formulation 9 (ALA+DHA+ARA-2): chicken meal 145 parts, sweet potato meal 35 parts, potato meal 30 parts, chicken oil 30 parts, chicken liver paste 18 parts, chicken liver meal 18 parts, minerals 8 parts, taurine 0.7 parts, cellulose 1 part, complex vitamins 8 parts, flaxseed oil 1.5 parts, ARA oil 1.5 parts, and DHA oil 2.5 parts; Formulation 10 (ALA+DHA+ARA-3): chicken meal 145 parts, sweet potato meal 35 parts, potato meal 30 parts, chicken oil 30 parts, chicken liver paste 18 parts, chicken liver meal 18 parts, minerals 8 parts, taurine 0.7 parts, cellulose 1 part, complex vitamins 8 parts, flaxseed oil 1.5 parts, ARA oil 2.5 parts, and DHA oil 1.5 parts; III. Test Process Fifty 5-month-old healthy beagle dogs, half male and half female, and fifty 5-month-old healthy short-haired cats, half male and half female, were selected. The 50 cats and the 50 dogs were each randomly divided into 5 groups, with 10 replicates in each group and 1 cat or dog in each replicate. Formulations 1-5 were provided for the dogs, and formulations 6-10 were provided for the cats. The dogs and cats were allowed to freely eat and drink during the test period. The formal test period was 30 days.

[0036] 1. Eating performance On the 1st and 30th days of the test, the test dogs and cats were weighed on an empty stomach. The food intake and water intake of each dog and cat were recorded during the test period, and the average daily food intake and average daily water intake were calculated. The results are shown in Tables 1-2 below. Table 1 Effect of "3A fatty acids" on the eating performance of dogs Table 2 Effect of "3A fatty acids" on the eating performance of cats As can be seen from Tables 1-2, during the test period, the young dogs and cats showed normal eating behavior. Among them, the dogs and cats ingested food and water according to their eating habits before the test, and no abnormal eating behavior or food refusal was observed. The appetite of the dogs and cats remained stable, and no abnormal eating performance was observed, which indicated that they were in good health and their eating habits were not affected by external factors, maintaining a normal eating pattern.

[0037] 2. Serum antioxidant indexes On the 30th day of the experiment, before morning feeding, the forelimb venous blood of each animal was collected, part of which was injected into an anticoagulant tube containing sodium heparin, and subsequent blood routine determination was performed; another part was placed in a general centrifuge tube for 15 min, centrifuged at 4000 r / min for 5 min, and the serum was divided into centrifuge tubes, stored at -20℃, and subsequent determination of serum immune indicators and antioxidant indicators was performed. Total antioxidant capacity (T-AOC), catalase (CAT), total superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and malondialdehyde (MDA) were detected using a kit (Nanjing Jiancheng Biological Engineering Institute), and the results are shown in Figures 3-4 ; The antioxidant system is one of the important defense systems of the body, and the activity of the immune system can also cause the production of oxidative stress. Immune cells release oxidizing substances when clearing pathogens, and external antioxidants or internal antioxidant factors can reduce the impact of oxidative stress on the immune system by removing free radicals and other oxidizing substances, thereby improving the function of the immune system. The activities of antioxidant enzymes such as T-AOC, CAT, SOD, etc. can reflect the body's ability to resist oxidative stress to some extent, thereby indirectly reflecting the good or bad of regulating pet immunity. MDA is an important product of lipid peroxidation in biological cell membranes, and its content change is positively correlated with the oxidative stress level; In this discussion, Formulas 3-5 increase the activity of antioxidant enzymes in dog serum compared to Formulas 1-2, with CAT activity significantly increased, and MDA in dog serum after feeding Formula 3 significantly decreased; Formulas 7-10 significantly increase the activity of antioxidant enzymes in cat serum compared to Formula 6, and significantly reduce the content of MDA. Compared with the above, the antioxidant effect of Formula 9 is the most obvious. Therefore, by regulating the types, doses and proportions of 3A fatty acids in dog and cat food, the antioxidant system of test dogs and cats can be strengthened, and the oxidative stress level can be reduced.

[0038] 3. Serum immune indicators On the 30th day of the experiment, before morning feeding, the forelimb venous blood of each animal was collected, part of which was injected into an anticoagulant tube containing sodium heparin, and subsequent blood routine determination was performed; another part was placed in a general centrifuge tube for 15 min, centrifuged at 4000 r / min for 5 min, and the serum was divided into centrifuge tubes, stored at -20℃, and subsequent determination of serum immune indicators and antioxidant indicators was performed. Immune globulin A (IgA), immune globulin G (IgG), immune globulin M (IgM), immune globulin D (IgD) and interleukin-6 (IL-6) were detected using a kit (Beijing Huaying Biological Technology Institute), and the results are shown in Figures 5-6 ; The immune system is an important defense system in the body, which can resist external pathogens (such as bacteria, viruses, fungi, etc.) and abnormal cells, protect the body from infection and disease, and has multiple functions such as recognition and induction of immune response, activation and proliferation of immune cells, regulation of inflammatory response. IgA mainly exists in the mucosal surface, such as respiratory tract, digestive tract, urinary tract, etc., which can prevent pathogens from invading the body; IgG is the most common immunoglobulin, accounting for 75%-80% of the total amount of immunoglobulin in the body, and is the key indicator of secondary humoral immunity in animal body; IgM is the largest immunoglobulin, which has strong bactericidal, complement activation, immune opsonization and agglutination effects, and also participates in the pathological process of some autoimmune diseases and hypersensitivity reactions; IgD has a very low content in serum, accounting for about 1% of the total immunoglobulin, and the content varies greatly among individuals, and can exist as a membrane receptor on the surface of immune cells; the reaction of excretion plays an important role in the regulation network of endocrine and immune system, and can activate the body's defense response and produce a large amount of IL-6 when the body is stimulated by inflammation, and the level is closely related to the degree of infection. IL-6 is mainly produced by T, B lymphocytes, macrophages and other cells, which can enhance or mediate the response of cells to immune cell secretions, and plays an important role in the regulation network of endocrine and immune system, and can activate the body's defense response when the body is stimulated by inflammation; In this discussion, compared with other formulas, formula 3 significantly increased the serum IgA and IgG levels of test dogs, and the IL-6 level of test dogs fed with formula 3 was significantly lower; and for cats, formulas 7-10 significantly increased the content of immunoglobulin in serum compared with formula 6, and the IL-6 level was also significantly lower, among which, the change of formula 9 was the most significant. This may be due to the appropriate 3A fatty acid formula stimulating the body's immune cells to produce related cytokines such as immunoglobulin or activating related immune signal pathways, stimulating the expression of related immune cells and cytokines to up-regulate, reducing the body's own inflammatory symptoms, resulting in that the body does not produce a large amount of IL-6 under the stimulation of inflammation. Therefore, by adjusting the type, dose and ratio of 3A fatty acid in dog and cat food, the immune defense system of test dogs and cats can be strengthened.

[0039] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change made on the basis of the technical essence of the present application to the above embodiment falls within the protection scope of the present application.

Claims

1. A pet food containing 3A fatty acids that can improve the immunity of young dogs and cats, characterized in that, It includes the following ingredients: chicken meal, sweet potato meal, potato meal, chicken fat, chicken liver, minerals, multivitamins, fiber, flaxseed oil, ARA oil, and DHA algal oil; In flaxseed oil, C 22 H 32 Based on O2 triglycerides, the ALA content was 45.0-50.0%; based on C... 20 H 30 Based on O2 triglycerides, linoleic acid content is <20%; In ARA oil, C 22 H 32 Based on O2 triglycerides, the ARA content is 40.0-45.0%; DHA in algal oil is mainly composed of C. 22 H 32 Based on O2 triglycerides, the DHA content is 40.0-45.0%; based on C... 20 H 30 Based on O2 triglycerides, EPA content is <0.8%; The 3A fatty acid pet food contains 0.15-0.60% ALA, 0.15-0.60% ARA, and 0.15-0.60% DHA.

2. The 3A fatty acid pet food that can improve the immunity of young dogs and cats according to claim 1, characterized in that, The pet food is puppy food, and by weight, it includes the following components: Chicken meal 60-70 parts, sweet potato meal 60-80 parts, potato meal 40-60 parts, beef meal 30-40 parts, chicken fat 30-40 parts, chicken liver meal 5-10 parts, chicken liver paste 5-10 parts, minerals 7-12 parts, multivitamins 6-10 parts, fiber 1-2 parts, flaxseed oil 0.5-2 parts, ARA oil 0.5-2 parts, and DHA algal oil 0.5-4 parts.

3. The 3A fatty acid pet food that can improve the immunity of young dogs and cats according to claim 1, characterized in that, The pet food is puppy food, and by weight, it includes the following components: Chicken meal 60-70 parts, sweet potato meal 60-80 parts, potato meal 40-60 parts, beef meal 30-40 parts, chicken fat 30-40 parts, chicken liver meal 5-10 parts, chicken liver paste 5-10 parts, minerals 7-12 parts, multivitamins 6-10 parts, fiber 1-2 parts, flaxseed oil 0.5-2 parts, ARA oil 0.5-4 parts, and DHA algal oil 0.5-2 parts.

4. The 3A fatty acid pet food that can improve the immunity of young dogs and cats according to claim 1, characterized in that, The pet food is kitten food, and by weight, it includes the following components: Chicken meal 120-160 parts, sweet potato meal 30-50 parts, potato meal 20-40 parts, chicken fat 30-40 parts, chicken liver meal 5-10 parts, chicken liver paste 5-10 parts, minerals 8-12 parts, multivitamins 5-10 parts, taurine 0.5-1 part, cellulose 1-2 parts, flaxseed oil 1-3 parts, ARA oil 1-3 parts, and DHA algal oil 2-5 parts.

5. The 3A fatty acid pet food that can improve the immunity of young dogs and cats according to claim 1, characterized in that, The pet food is kitten food, and by weight, it includes the following components: Chicken meal 120-160 parts, sweet potato meal 30-50 parts, potato meal 20-40 parts, chicken fat 30-40 parts, chicken liver meal 5-10 parts, chicken liver paste 5-10 parts, minerals 8-12 parts, multivitamins 5-10 parts, taurine 0.5-1 part, cellulose 1-2 parts, flaxseed oil 1-3 parts, ARA oil 2-5 parts, and DHA algal oil 1-3 parts.

6. The 3A fatty acid pet food for improving the immunity of young dogs and cats according to any one of claims 1-5, characterized in that, The chicken meal contains ≥72% crude protein and <1% ALA; its fineness is 30-40 mesh. Sweet potato flour contains 20% amylose and 50% amylopectin; its fineness is 40-50 mesh. The potato flour contains 15% amylose and 56% amylopectin; its fineness is 60-70 mesh. The beef meal contains ≥68% crude protein and <1% ALA; the fineness is 20-30 mesh. Chicken fat is pure chicken fat, with an ALA content of <2%; Chicken liver powder is pure chicken liver powder with a fineness of 80-100 mesh.

7. The 3A fatty acid pet food that can improve the immunity of young dogs and cats according to claim 6, characterized in that, The main elements in the minerals include iron, copper, manganese, zinc, selenium and iodine, and the fineness is 60-70 mesh. Multivitamins include vitamin A acetate, vitamin B1, vitamin B2, vitamin B6, and vitamin B1. 12 Vitamin D3, DL-calcium pantothenate, D-biotin, folic acid, nicotinamide, D-calcium pantothenate, DL-α-tocopherol acetate, and sodium menadione bisulfite.

8. A method for preparing a 3A fatty acid pet food that can improve the immunity of young dogs and cats, characterized in that, Includes the following steps: S1 Feeding: Feed the chicken powder, sweet potato powder, potato powder and / or beef powder into the corresponding large feed bins respectively, and feed the minerals, multivitamins, cellulose and / or taurine into the corresponding small feed bins respectively; S2 First Mixing: Weigh the materials from step S1 according to the formula, and then put them into mixing silo I and mix them evenly; S3 Crushing: The mixture obtained in step S2 is fed into a coarse crusher for coarse crushing; then, it is fed into a fine crusher for fine crushing. S4 Screening: The finely pulverized material obtained in step S3 is fed into a screening device for screening and impurity removal; S5 Second Mixing: The sieved material obtained in step S4 is fed into mixing bin II and mixed evenly; S6 Conditioning and Extrusion: Using a feeder, the mixture obtained in step S5 is fed into the conditioner and conditioned with water at a rate of 540-630 kg / h; then, it is fed into the extruder, and the temperature is controlled at 120-130℃, the internal pressure at 1.0-1.2 bar, and the outlet pressure at 33-40 bar to obtain the extruded material; S7 Drying: Using a negative pressure air duct and dryer, the moisture content of the extruded material obtained in step S6 is controlled to 9-11%, cooled, and then introduced into the spraying chamber to obtain a semi-finished pet food product. S8 spraying: Vacuum spraying of semi-finished pet food products; Specifically, it includes a three-layer spraying method: the first layer is sprayed with chicken oil, flaxseed oil, ARA oil and DHA algal oil; the second layer is sprayed with chicken liver paste; and the third layer is sprayed with chicken liver powder. S9 Cooling and Packaging: The spray paint obtained in step S8 is placed in a cooler for cooling; then, it enters the finished product warehouse, is screened by a double-layer sieve, and is packaged according to the set specifications.

9. The method for preparing the 3A fatty acid pet food that can improve the immunity of young dogs and cats according to claim 7, characterized in that, In step S3, the mixture obtained in step S2 is fed into a coarse pulverizer and pulverized to a particle size of 600-700 μm; then, it is fed into a fine pulverizer and pulverized to a particle size of 200-300 μm.

10. The method for preparing the 3A fatty acid pet food that can improve the immunity of young dogs and cats according to claim 8, characterized in that, In step S6, the feeding speed is 4000-47000 kg / h; the cutting speed of the extruder is 1000-1400 r / min.

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