Plant extract composition pet food for improving dog tear stains and preparation method of plant extract composition pet food

Abstract

The present invention belongs to the technical field of pet food and particularly relates to a dog tear stain improving plant extract composition pet food and a preparation method thereof, and the dog tear stain improving plant extract composition pet food comprises the following components in parts by weight: 50-60 parts of duck meat, 10-20 parts of soybean enzymolysis protein, 5-10 parts of cassava starch, 3-5 parts of fish oil, 2-4 parts of snow pears, 0.4-0.8 part of vitamin C, 0.4-0.8 part of vitamin E and 1-2 parts of cellulose. The composition comprises the following components in parts by weight: 0.1-0.3 part of chicory root powder, 0.1-0.3 part of yucca extract, 0.4-1.2 parts of plant extract composition and 0.1-0.3 part of nanocrystalline curcumin. According to the air-dried pet food added with the specially-treated combination of the hypoallergenic meat source and the plant extract, the nutritional ingredients are locked to the maximum extent, the nutrient digestion and absorption rate is increased, and the tear stain phenomenon caused by dietary habits can be improved and eliminated only through daily feeding.

Description

Technical Field

[0001] The invention belongs to the technical field of pet food, and in particular relates to a plant extract composition pet food for improving dog tear stains and a preparation method thereof. Background Art

[0002] With the rise of my country's pet economy, more and more dog lovers use their pets to express their emotional needs. The status of dogs in the family has risen sharply, and pet owners are paying more and more attention to the health and nutrition of their pet dogs. Among them, the tear stains problem of pet dogs is one of the concerns of pet owners.

[0003] Dog tear stains are dark marks formed when dog eye secretions (porphyrins, iron-containing compounds) come into contact with the dog's hair. They not only affect the pet's appearance, but also cause the surrounding skin to be in a moist state for a long time, breeding bacteria and fungi, leading to inflammation, which in turn affects the pet's health.

[0004] The causes of tear stains in dogs are very complex, and the formation of tear stains can be divided into physiological factors, pathological factors and dietary factors.

[0005] At present, pathological and physiological tear stains are mainly treated with drugs or clinical surgery. Clinical treatment not only requires a specific environment, but also has high treatment costs and certain risks.

[0006] Most tear stain improvement products on the market are topical medications that contain chemical ingredients that may irritate the dog's skin and eyes, and lack ingredients that protect the liver and gallbladder.

[0007] If dogs have improper diet for a long time, eat unfresh food, lack of vitamins and minerals, or contain highly allergenic ingredients, it will increase tear secretion. Existing tear stain removal products are mostly puffed products. Traditional fresh meat puffed dry food adds a variety of meat sources, which increases the risk of allergies. The added meat sources are mostly unprocessed meat or meat powder of lower quality, and are made through high-temperature puffing, which easily denatures the protein, and the nutritional molecules such as meat protein, vitamins and minerals are easily lost, and the nutritional value decreases. Summary of the invention

[0008] In view of the deficiencies in the above-mentioned prior art, the present invention provides a plant extract composition pet food for improving dog tear stains and a preparation method thereof, and adds a specially treated low-allergy meat source and a plant extract combination to the air-dried pet food, which locks in nutrients to the greatest extent and improves the digestion and absorption rate of nutrients. The tear stain phenomenon caused by eating habits can be improved and eliminated through daily feeding.

[0009] The specific technical solutions are as follows:

[0010] The first object of the present invention is to provide a plant extract composition pet food for improving dog tear stains, which comprises the following components by weight: 50-60 parts of duck meat, 10-20 parts of soybean enzymatic protein, 5-10 parts of cassava starch, 3-5 parts of fish oil, 2-4 parts of snow pear, 0.4-0.8 parts of vitamin C, 0.4-0.8 parts of vitamin E, 1-2 parts of cellulose, 0.1-0.3 parts of chicory root powder, 0.1-0.3 parts of yucca extract, 0.4-1.2 parts of plant extract composition, and 0.1-0.3 parts of nanocrystalline curcumin.

[0011] The beneficial effects of adopting the above scheme are: red meat (beef, mutton and venison) is rich in iron, which increases the burden on the dog's liver after ingestion. It needs to process additional iron and magnesium, as well as higher saturated fat, which will also increase the burden on the liver, leading to the accumulation of porphyrins and aggravating tear stains. The present invention selects milder and less sensitive duck meat as the main protein source to reduce tear stains. Duck meat is rich in B vitamins and vitamin E, more than other meats, has anti-inflammatory and heat-clearing effects, contains unsaturated fatty acids and low-carbon saturated fatty acids, is easy to digest, and reduces the metabolic burden on the liver. The protein and fat in the emulsified duck meat are more evenly distributed, the texture is delicate, and the palatability is improved.

[0012] The meat raw materials are processed by utilizing the emulsifying effect of enzymatically hydrolyzed soybean protein. At the same time, the enzymatically hydrolyzed soybean protein contains small peptides that are easily digestible and absorbable, which reduces the digestive burden of pets.

[0013] Vitamin C has a variety of physiological effects in dogs, such as promoting immune system function, participating in antioxidant reactions, and promoting collagen synthesis. In the treatment of canine tear stains, the role of vitamin C may be to alleviate the symptoms of canine tear stains through its antioxidant and anti-inflammatory effects. In addition, vitamin C can also promote collagen synthesis and help maintain the health of the skin around the eyes. Vitamin E is a chain-breaking biological antioxidant that can neutralize free radicals. Vitamin E can reduce inflammatory reactions and edema in the periocular area, while also protecting eye tissues from free radical damage. In products that supplement a large amount of unsaturated fatty acids, additional vitamin E is needed to alleviate oxidation in the body. Dogs that lack vitamin E will experience retinal degeneration.

[0014] Curcumin is a natural polyphenol extracted from turmeric, a plant of the ginger family. It has a variety of nutritional activities and pharmacological functions, such as anti-oxidation, anti-inflammatory, anti-cancer, anti-tumor, anti-diabetic, anti-viral, lipid-lowering and immune-enhancing effects. However, after conventional curcumin enters the body, it is poorly absorbed in the gastrointestinal tract, and only a very small amount can be absorbed and utilized. If it is not fully absorbed by the body, curcumin will be quickly cleared, greatly reducing its utilization effect. Nanocrystalline curcumin is based on the principle of supramolecular chemistry, which strengthens the interaction between curcumin and the carrier, allowing it to exist stably in a glassy state for a long time, reducing the work done by the lattice energy during dissolution, thereby improving bioavailability. The nanocrystalline curcumin used in the present invention can increase the contact area with the gastrointestinal fluid, and can significantly improve the digestion and absorption of curcumin in the body. At the same time, it is matched with soybean small molecule peptides that are easier to digest and absorb after enzymatic hydrolysis, so as to improve the digestion and absorption of the material in the pet's body, prolong its time in the body, improve bioavailability, give full play to the ability of curcumin to regulate fat metabolism, activate the antioxidant system, and improve the protective effect on the pet's liver.

[0015] Furthermore, the plant extract composition comprises the following components by weight: 0.1-0.3 parts of bilberry extract, 0.1-0.3 parts of wolfberry extract, 0.1-0.3 parts of cassia seed extract, and 0.1-0.3 parts of natural lutein.

[0016] The beneficial effects of the above scheme are: with the plant extract composition (wolfberry extract, cassia seed extract, bilberry extract, natural lutein), the antioxidant capacity is improved and the occurrence of inflammation is inhibited. Natural lutein comes from natural marigold and is a natural antioxidant. It forms a double natural antioxidant superposition effect with bilberry extract containing vitamin C and vitamin E, which can fight free radicals, inhibit and remove free radical activity, reduce oxidative stress in eye tissue, and thus play an antioxidant role, thereby promoting the formation of rhodopsin in the retina and increasing the density of retinal macular color, inhibiting oxidative damage to eye tissue. After removing free radicals in the body, the wolfberry extract whose main active substances are wolfberry polysaccharides and the cassia seed extract whose free anthraquinones are synergistically inhibit inflammatory reactions, reduce pro-inflammatory factors, and achieve heat-clearing and anti-inflammatory effects in the body, thereby achieving the effect of improving eyesight.

[0017] Furthermore, the duck meat is fresh duck meat, the snow pear is fresh snow pear, and the cassava starch is pregelatinized cassava starch.

[0018] The beneficial effects of the above scheme are: with fresh pear, it can achieve the effects of clearing away heat, improving eyesight and removing internal heat. At the same time, the yucca extract and the soluble dietary fiber in fresh fruits and vegetables promote digestion and inhibit the fermentation of harmful substances.

[0019] The addition of pre-gelatinized cassava starch makes it have better fluidity, adhesion and stability than ordinary cassava starch. It can swell and disperse quickly in water and has higher viscosity and transparency. In comparison, ordinary cassava starch needs to be heated to gelatinize and has a lower viscosity.

[0020] The second object of the present invention is to provide a method for preparing the above-mentioned plant extract composition pet food for improving dog tear stains, comprising the following steps:

[0021] S1. Weigh the duck meat and snow pear according to the weight, and coarsely mince the duck meat and snow pear respectively;

[0022] S2, placing the roughly minced duck meat and the weighed soy enzymatic protein in an emulsifier for emulsification;

[0023] S3, weigh other raw and auxiliary materials according to weight, put them into a blender with the emulsified product in S2, and stir evenly to obtain a mixed raw material;

[0024] S4, conveying the mixed raw material obtained in S3 to a molding device and extruding it into round particles;

[0025] S5, spreading the extruded particles on the net and air-drying them;

[0026] S6, transporting the air-dried particles to the metal detector via a cooling line;

[0027] S7. Use a vibrating screen to sieve out excess powder from qualified products;

[0028] S8. Put the final qualified products into packaging bags and seal them.

[0029] Furthermore, in step S1, the duck meat and the snow pear are respectively and sequentially passed through mesh plates with apertures of 16 mm and 12 mm for coarse mincing.

[0030] Furthermore, in step S2, the apertures of the screen of the emulsifier are 4 mm / 2.5 mm / 1.5 mm respectively, and the emulsification time is 5-30 min.

[0031] Furthermore, in step S4, the vacuum degree of the molding equipment is set to 100%.

[0032] Furthermore, in step S4, the pellets are extruded into round particles with a diameter of 8 mm.

[0033] Furthermore, in step S5, the air-drying temperature is set to 70-80° C., and the air-drying time is 8-10 hours.

[0034] Furthermore, in step S5, the moisture content is air-dried to below 14%.

[0035] Furthermore, in step S6, the cooling time for natural cooling of the cooling line is 3-5 minutes.

[0036] Furthermore, in step S6, the metal detector performs sensitivity testing every hour using 1.5 mm iron, 1.5 mm non-ferrous and 1.5 mm stainless steel test blocks.

[0037] The beneficial effect of adopting the above scheme is: the present invention aims to improve the utilization rate of the plant extract composition by adding a specific plant extract composition and pre-treating the raw materials in pet food according to a scientific ratio and low-temperature air drying, and the tear stain phenomenon caused by eating habits can be improved and eliminated only through daily feeding.

[0038] In view of the problems that the existing puffed dog food for removing tear marks of pets has a wide variety of meat sources, uneven quality, high sensitization rate, and pet nutrients contain irritating chemical ingredients, the present invention can protect the enzymes, nutrients and proteins of the food itself through a low-temperature air-drying process, lock the nutritional components of the raw materials to a great extent, and is beneficial to improving the digestion and absorption rate of nutrients. In addition, emulsified, low-sensitivity and mild duck meat is added to reduce the risk of sensitization. At the same time, through the synergistic effect of wolfberry extract, cassia seed extract, bilberry extract and natural lutein, the synergistic effect of snow pear and yucca extracts, and the synergistic effect of soy enzymatic protein and nanocrystalline curcumin, the liver and gallbladder health of dogs is protected on the basis of improving tear marks. DETAILED DESCRIPTION

[0039] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention. The parts described in the specific implementation manner are parts by weight.

[0040] In a specific embodiment, the soybean enzymatic protein used was purchased from Shandong Yuxin Biotechnology Co., Ltd., the pregelatinized cassava starch used was purchased from Hangzhou Prostar Starch Co., Ltd., the yucca extract used was purchased from Weifang Xinmeite Agriculture and Animal Husbandry Technology Co., Ltd., the bilberry extract, wolfberry extract, and cassia seed extract used were purchased from Xi'an Lesen Biotechnology Co., Ltd., and the nanocrystalline curcumin used was purchased from Hangzhou Aibed Life Science Research Institute.

[0041] Example 1

[0042] A plant extract composition pet food for improving dog tear stains comprises the following components by weight: 50 parts of fresh duck meat, 10 parts of soy enzymatic protein, 5 parts of pregelatinized cassava starch, 3 parts of fish oil, 2 parts of fresh snow pear, 0.4 parts of vitamin C, 0.4 parts of vitamin E, 1 part of cellulose, 0.1 parts of chicory root powder, 0.1 parts of yucca extract, 0.1 parts of bilberry extract, 0.1 parts of wolfberry extract, 0.1 parts of cassia seed extract, 0.1 parts of natural lutein and 0.1 parts of nanocrystalline curcumin.

[0043] A method for preparing a plant extract composition pet food for improving dog tear stains comprises the following steps:

[0044] S1. Weigh fresh duck meat and fresh pear by weight, and coarsely mince the fresh duck meat and fresh pear through mesh plates with apertures of 16 mm and 12 mm, respectively;

[0045] S2, placing the coarsely minced duck meat and the weighed soy enzymatic protein in an emulsifier for emulsification, the mesh apertures of the emulsifier are 4 mm / 2.5 mm / 1.5 mm respectively, and the emulsification time is 5 min;

[0046] S3, weigh other raw and auxiliary materials according to weight, put them into a blender with the emulsified product in S2, and stir evenly to obtain a mixed raw material;

[0047] S4, conveying the mixed raw material obtained in S3 to a molding device, setting the vacuum degree of the molding device to 100%, and extruding the mixed raw material into round particles with a diameter of 8 mm;

[0048] S5, spreading the extruded particles on the net and air-drying them, with the air-drying temperature set at 70°C and the air-drying time set at 10 hours, until the moisture content is below 14%;

[0049] S6. The air-dried particles are transported to the metal detector via a cooling line. The cooling time of the cooling line for natural cooling is 3 minutes. The metal detector is tested for sensitivity every hour using 1.5 mm iron, 1.5 mm non-ferrous and 1.5 mm stainless steel test blocks;

[0050] S7. Use a vibrating screen to sieve out excess powder from qualified products;

[0051] S8. Put the final qualified products into packaging bags and seal them.

[0052] Example 2

[0053] A plant extract composition pet food for improving dog tear stains comprises the following components by weight: 55 parts of fresh duck meat, 15 parts of soy enzymatic protein, 7 parts of pregelatinized cassava starch, 4 parts of fish oil, 3 parts of fresh snow pear, 0.6 parts of vitamin C, 0.6 parts of vitamin E, 1.5 parts of cellulose, 0.2 parts of chicory root powder, 0.2 parts of yucca extract, 0.2 parts of bilberry extract, 0.2 parts of wolfberry extract, 0.2 parts of cassia seed extract, 0.2 parts of natural lutein and 0.2 parts of nanocrystalline curcumin.

[0054] A method for preparing a plant extract composition pet food for improving dog tear stains comprises the following steps:

[0055] S1. Weigh fresh duck meat and fresh pear by weight, and coarsely mince the fresh duck meat and fresh pear through mesh plates with apertures of 16 mm and 12 mm, respectively;

[0056] S2, placing the coarsely minced duck meat and the weighed soy enzymatic protein in an emulsifier for emulsification, the mesh apertures of the emulsifier are 4 mm / 2.5 mm / 1.5 mm respectively, and the emulsification time is 18 min;

[0057] S3, weigh other raw and auxiliary materials according to weight, put them into a blender with the emulsified product in S2, and stir evenly to obtain a mixed raw material;

[0058] S4, conveying the mixed raw material obtained in S3 to a molding device, setting the vacuum degree of the molding device to 100%, and extruding the mixed raw material into round particles with a diameter of 8 mm;

[0059] S5, spreading the extruded particles on the net and air-drying them, with the air-drying temperature set at 75°C and the air-drying time set at 9 hours, until the moisture content is below 14%;

[0060] S6. The air-dried particles are transported to the metal detector via a cooling line. The cooling time of the cooling line for natural cooling is 4 minutes. The metal detector is tested for sensitivity every hour using 1.5 mm iron, 1.5 mm non-ferrous and 1.5 mm stainless steel test blocks;

[0061] S7. Use a vibrating screen to sieve out excess powder from qualified products;

[0062] S8. Put the final qualified products into packaging bags and seal them.

[0063] Example 3

[0064] A plant extract composition pet food for improving dog tear stains comprises the following components by weight: 60 parts of fresh duck meat, 20 parts of soy enzymatic protein, 10 parts of pregelatinized cassava starch, 5 parts of fish oil, 4 parts of fresh snow pear, 0.8 parts of vitamin C, 0.8 parts of vitamin E, 2 parts of cellulose, 0.3 parts of chicory root powder, 0.3 parts of yucca extract, 0.3 parts of bilberry extract, 0.3 parts of wolfberry extract, 0.3 parts of cassia seed extract, 0.3 parts of natural lutein and 0.3 parts of nanocrystalline curcumin.

[0065] A method for preparing a plant extract composition pet food for improving dog tear stains comprises the following steps:

[0066] S1. Weigh fresh duck meat and fresh pear by weight, and coarsely mince the fresh duck meat and fresh pear through mesh plates with apertures of 16 mm and 12 mm, respectively;

[0067] S2, placing the coarsely minced duck meat and the weighed soy enzymatic protein in an emulsifier for emulsification, the mesh apertures of the emulsifier are 4 mm / 2.5 mm / 1.5 mm respectively, and the emulsification time is 30 min;

[0068] S3, weigh other raw and auxiliary materials according to weight, put them into a blender with the emulsified product in S2, and stir evenly to obtain a mixed raw material;

[0069] S4, conveying the mixed raw material obtained in S3 to a molding device, setting the vacuum degree of the molding device to 100%, and extruding the mixed raw material into round particles with a diameter of 8 mm;

[0070] S5, spreading the extruded particles on the net and air-drying them, with the air-drying temperature set at 80°C and the air-drying time set at 8 hours, until the moisture content is below 14%;

[0071] S6. The air-dried particles are transported to the metal detector via a cooling line. The cooling time of the cooling line for natural cooling is 5 minutes. The metal detector is tested for sensitivity every hour using 1.5 mm iron, 1.5 mm non-ferrous and 1.5 mm stainless steel test blocks;

[0072] S7. Use a vibrating screen to sieve out excess powder from qualified products;

[0073] S8. Put the final qualified products into packaging bags and seal them.

[0074] Comparative Example 1

[0075] A pet food for improving dog tear stains comprises the following components by weight: 50 parts of fresh duck meat, 10 parts of soy enzymatic protein, 5 parts of pregelatinized cassava starch, 3 parts of fish oil, 4 parts of fresh snow pear, 0.4 parts of vitamin C, 0.4 parts of vitamin E, 1 part of cellulose, 0.3 parts of chicory root powder, 0.3 parts of yucca extract, 0.3 parts of wolfberry extract, 0.3 parts of cassia seed extract, 0.3 parts of natural lutein, and 0.3 parts of nanocrystalline curcumin.

[0076] A method for preparing pet food for improving dog tear stains is disclosed, with reference to Example 1, but differs from Example 1 in that bilberry extract is not added.

[0077] Comparative Example 2

[0078] A pet food for improving dog tear stains, referring to comparative example 1, is different from comparative example 1 in that 0.3 parts of cassia seed extract is replaced by 0.3 parts of bilberry extract.

[0079] A method for preparing pet food for improving dog tear stains, referring to Comparative Example 1, which is different from Comparative Example 1 in that 0.3 parts of Cassia seed extract is replaced by 0.3 parts of bilberry extract.

[0080] Comparative Example 3

[0081] A pet food for improving dog tear stains, referring to comparative example 1, is different from comparative example 1 in that 0.3 parts of natural lutein is replaced by 0.3 parts of bilberry extract.

[0082] A method for preparing pet food for improving dog tear stains, referring to Comparative Example 1, which is different from Comparative Example 1 in that 0.3 parts of natural lutein is replaced with 0.3 parts of bilberry extract.

[0083] Comparative Example 4

[0084] A pet food for improving dog tear stains, referring to comparative example 1, is different from comparative example 1 in that 0.3 parts of wolfberry extract is replaced by 0.3 parts of bilberry extract.

[0085] A method for preparing pet food for improving dog tear stains, referring to Comparative Example 1, the difference from Comparative Example 1 is that 0.3 parts of wolfberry extract is replaced by 0.3 parts of bilberry extract.

[0086] Comparative Example 5

[0087] A pet food for improving dog tear stains, referring to comparative example 1, is different from comparative example 1 in that 0.3 parts of nanocrystalline curcumin is replaced by 0.3 parts of bilberry extract.

[0088] A method for preparing pet food for improving dog tear stains, referring to Comparative Example 1, which is different from Comparative Example 1 in that 0.3 parts of nanocrystalline curcumin is replaced with 0.3 parts of bilberry extract.

[0089] Comparative Example 6

[0090] A pet food for improving dog tear stains, referring to comparative example 1, is different from comparative example 1 in that 10 parts of enzymatically hydrolyzed soybean protein are replaced with 0.3 parts of bilberry extract.

[0091] A method for preparing pet food for improving dog tear stains, referring to Comparative Example 1, the difference from Comparative Example 1 is that 10 parts of enzymatically hydrolyzed soybean protein are replaced with 0.3 parts of bilberry extract.

[0092] Comparative Example 7

[0093] A pet food for improving dog tear stains, referring to comparative example 1, is different from comparative example 1 in that 0.3 parts of yucca extract is replaced by 0.3 parts of bilberry extract.

[0094] A method for preparing pet food for improving dog tear stains, referring to Comparative Example 1, the difference from Comparative Example 1 is that 0.3 parts of yucca extract is replaced by 0.3 parts of bilberry extract.

[0095] Comparative Example 8

[0096] A pet food for improving tear stains in dogs, referring to comparative example 1, is different from comparative example 1 in that 4 parts of fresh snow pears are replaced with 0.3 parts of bilberry extract.

[0097] A method for preparing pet food for improving dog tear stains, referring to Comparative Example 1, the difference from Comparative Example 1 is that 4 parts of fresh snow pears are replaced by 0.3 parts of bilberry extract.

[0098] Test experiment:

[0099] 1. Tear stain scoring experiment:

[0100] 55 dogs with tear stain problems but otherwise healthy were selected and divided into 11 groups on average. The dogs were fed with pet food prepared in Examples 1-3 and Comparative Examples 1-8 at regular intervals and in fixed quantities twice a day. After the formal experiment began, the tear stains of the dogs were scored every 7 days for 4 weeks, i.e., 0 days, 7 days, 14 days, 21 days and 28 days. The ratings were made according to the tear stain changes, and the rating criteria are shown in Table 1.

[0101] Table 1 Tear stain rating

[0102]

[0103] The tear mark rating data are shown in Table 2 below. The tear mark rating data are expressed as mean ± standard error, and the same shoulder letter represents no significant difference.

[0104] Table 2 Effect of pet food of each embodiment and comparative example on average tear stain score of pet dogs

[0105] project 0d 7d 14d 21d 28d Example 1 3.81±0.25 <![CDATA[3.36±0.25 ab ]]> <![CDATA[2.92±0.28 a ]]> <![CDATA[2.58±0.40 a ]]> <![CDATA[2.28±0.35 a ]]> Example 2 3.83±0.3 <![CDATA[3.32±0.13 a ]]> <![CDATA[2.88±0.13 a ]]> <![CDATA[2.50±0.30 a ]]> <![CDATA[2.24±0.22 a ]]> Example 3 3.83±0.29 <![CDATA[3.4±0.24 ab ]]> <![CDATA[2.9±0.27 a ]]> <![CDATA[2.52±0.31 a ]]> <![CDATA[2.3±0.25 a ]]> Comparative Example 1 3.84±0.27 <![CDATA[3.68±0.13 b ]]> <![CDATA[3.36±0.11 b ]]> <![CDATA[3.26±0.21 b ]]> <![CDATA[3.0±0.19 b ]]> Comparative Example 2 3.82±0.25 <![CDATA[3.6±0.1 ab ]]> <![CDATA[3.38±0.15 b ]]> <![CDATA[3.24±0.16 b ]]> <![CDATA[3.02±0.23 b ]]> Comparative Example 3 3.84±0.31 <![CDATA[3.64±0.11 ab ]]> <![CDATA[3.38±0.07 b ]]> <![CDATA[3.28±0.19 b ]]> <![CDATA[3.04±0.23 b ]]> Comparative Example 4 3.86±0.20 <![CDATA[3.66±0.09 ab ]]> <![CDATA[3.40±0.04 b ]]> <![CDATA[3.30±0.17 b ]]> <![CDATA[3.02±0.19 b ]]> Comparative Example 5 3.83±0.19 <![CDATA[3.56±0.33 ab ]]> <![CDATA[3.26±0.27 b ]]> <![CDATA[3.14±0.3 b ]]> <![CDATA[2.82±0.38 b ]]> Comparative Example 6 3.84±0.22 <![CDATA[3.54±0.31 ab ]]> <![CDATA[3.26±0.31 b ]]> <![CDATA[3.1±0.32 b ]]> <![CDATA[2.74±0.28 b ]]> Comparative Example 7 3.86±0.24 <![CDATA[3.56±0.29 ab ]]> <![CDATA[3.24±0.27 b ]]> <![CDATA[3.1±0.36 b ]]> <![CDATA[2.72±0.30 b ]]> Comparative Example 8 3.8±0.26 <![CDATA[3.5±0.37 ab ]]> <![CDATA[3.22±0.31 b ]]> <![CDATA[3.1±0.35 b ]]> <![CDATA[2.74±0.29 b ]]>

[0106] By comparing the test experimental data in Table 2, it can be seen that the scores of Examples 1-3 of the present invention are significantly lower than those of Comparative Examples 1-4, indicating that the wolfberry extract, cassia seed extract, bilberry extract, and natural lutein in the plant extract composition of Examples 1-3 of the present invention have a synergistic effect, which can significantly improve the tear marks of pet dogs; the scores of Examples 1-3 of the present invention are significantly lower than those of Comparative Examples 5-6, indicating that the nanocrystalline curcumin and soybean enzymatic protein in Examples 1-3 of the present invention have a synergistic effect, which can improve the digestion and absorption of materials in pets, reduce the digestive burden of pets, improve bioavailability, and improve the protective effect on pet livers, thereby improving the tear marks of pet dogs; the scores of Examples 1-3 of the present invention are significantly lower than those of Comparative Examples 7-8, indicating that the fresh snow pear and yucca extracts in Examples 1-3 of the present invention have a synergistic effect, and the soluble dietary fiber in the yucca extract and fresh fruits and vegetables promote digestion and inhibit the fermentation of harmful substances, thereby improving the tear marks of pet dogs.

[0107] 2. Digestion and absorption experiment:

[0108] 35 dogs were selected, healthy and disease-free, and were evenly divided into 7 groups, corresponding to the pet foods prepared in Examples 1-3 and Comparative Examples 5-8, respectively. The pet digestion and absorption experiment was conducted by the 24-hour full collection of feces and urine method, with a test period of 10 days, 6 days of pre-feeding, and 4 days of formal experimental period to collect feces. During the formal experiment, feces were collected every day, weighed, and dried to determine the apparent digestibility of dry matter, crude protein, and crude fat in feces and feed. The data are shown in Table 3, and the data are expressed as mean ± standard error. The same shoulder letter represents no significant difference.

[0109] Apparent digestibility of nutrients (%) = {1-(nutrient content in feces × acid-insoluble ash in feed) / (nutrient content in feed × acid-insoluble ash in feces)}×100

[0110] Table 3 Effects of pet food of each embodiment and comparative example on digestion and absorption of pet dogs

[0111] project Apparent digestibility of dry matter Apparent digestibility of crude protein Apparent digestibility of crude fat Example 1 <![CDATA[86.93±0.15 a ]]> <![CDATA[90.8±0.22 a ]]> <![CDATA[95.78±0.17 a ]]> Example 2 <![CDATA[86.8±0.34 a ]]> <![CDATA[90.83±0.15 a ]]> <![CDATA[95.7±0.08 a ]]> Example 3 <![CDATA[86.98±0.10 a ]]> <![CDATA[90.93±0.13 a ]]> <![CDATA[95.8±0.18 a ]]> Comparative Example 5 <![CDATA[85.05±0.13 b ]]> <![CDATA[87.5±0.34 b ]]> <![CDATA[92.75±0.21 b ]]> Comparative Example 6 <![CDATA[84.93±0.22 b ]]> <![CDATA[87.6±0.32 b ]]> <![CDATA[92.78±0.26 b ]]> Comparative Example 7 <![CDATA[85.2±0.36 b ]]> <![CDATA[87.85±0.31 b ]]> <![CDATA[92.83±0.17 b ]]> Comparative Example 8 <![CDATA[84.88±0.13 b ]]> <![CDATA[87.82±0.31 b ]]> <![CDATA[92.85±0.24 b ]]>

[0112] By comparing the test experimental data in Table 3, it can be seen that the apparent digestibility of dry matter, crude protein and crude fat in Examples 1-3 of the present invention is significantly higher than that in Comparative Examples 5-6, which further illustrates that the nanocrystalline curcumin in Examples 1-3 of the present invention and the enzymatic soy protein have a synergistic effect, can improve the digestion and absorption of materials in the pet's body, reduce the digestive burden of the pet, improve the bioavailability, and improve the protective effect on the pet's liver, thereby improving the tear marks of pet dogs; the apparent digestibility of dry matter, crude protein and crude fat in Examples 1-3 of the present invention is significantly higher than that in Comparative Examples 7-8, which further illustrates that the fresh snow pear and yucca extracts in Examples 1-3 of the present invention have a synergistic effect, and the soluble dietary fiber in the yucca extract and fresh fruits and vegetables promotes digestion and inhibits the fermentation of harmful substances, thereby improving the tear marks of pet dogs.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A plant extract composition pet food for improving dog tear stains, characterized in that: The invention comprises the following components by weight: 50-60 parts of duck meat, 10-20 parts of soy enzymatic protein, 5-10 parts of cassava starch, 3-5 parts of fish oil, 2-4 parts of snow pear, 0.4-0.8 parts of vitamin C, 0.4-0.8 parts of vitamin E, 1-2 parts of cellulose, 0.1-0.3 parts of chicory root powder, 0.1-0.3 parts of yucca extract, 0.4-1.2 parts of plant extract composition and 0.1-0.3 parts of nanocrystalline curcumin.

2. The plant extract composition pet food for improving dog tear stains according to claim 1, characterized in that: The plant extract composition comprises the following components by weight: 0.1-0.3 parts of bilberry extract, 0.1-0.3 parts of wolfberry extract, 0.1-0.3 parts of cassia seed extract, and 0.1-0.3 parts of natural lutein.

3. The plant extract composition pet food for improving dog tear stains according to claim 1 or 2, characterized in that: The duck meat is fresh duck meat, the pear is fresh pear, and the cassava starch is pregelatinized cassava starch.

4. A method for preparing a plant extract composition pet food for improving dog tear stains as claimed in any one of claims 1 to 3, characterized in that: The steps include: S1. Weigh the duck meat and snow pear according to the weight, and coarsely mince the duck meat and snow pear respectively; S2, placing the roughly minced duck meat and the weighed soy enzymatic protein in an emulsifier for emulsification; S3, weigh other raw and auxiliary materials according to weight, put them into a blender with the emulsified product in S2, and stir evenly to obtain a mixed raw material; S4, conveying the mixed raw material obtained in S3 to a molding device and extruding it into round particles; S5, spreading the extruded particles on the net and air-drying them; S6, transporting the air-dried particles to the metal detector via a cooling line; S7. Use a vibrating screen to sieve out excess powder from qualified products; S8. Put the final qualified products into packaging bags and seal them.

5. The method for preparing the plant extract composition pet food for improving dog tear stains according to claim 4, characterized in that: In step S4, the vacuum degree of the molding equipment is set to 100%.

6. The method for preparing the plant extract composition pet food for improving dog tear stains according to claim 4, characterized in that: In step S5, the air-drying temperature is set to 70-80° C., and the air-drying time is 8-10 hours.

7. The method for preparing the plant extract composition pet food for improving dog tear stains according to claim 4 or 6, characterized in that: In the step S5, the moisture content is dried by air to below 14%.

8. The method for preparing the plant extract composition pet food for improving dog tear stains according to claim 4, characterized in that: In step S6, the cooling time for the cooling line to perform natural cooling is 3-5 minutes.

9. The method for preparing the plant extract composition pet food for improving dog tear stains according to claim 4, characterized in that: In step S6, the metal detector performs sensitivity testing every hour using 1.5 mm iron, 1.5 mm non-ferrous and 1.5 mm stainless steel test blocks.

10. The method for preparing the plant extract composition pet food for improving dog tear stains according to claim 4, characterized in that: In the step S1, the duck meat and the snow pear are respectively coarsely minced through mesh plates with apertures of 16 mm and 12 mm; in the step S2, the mesh plate apertures of the emulsifier are 4 mm / 2.5 mm / 1.5 mm respectively; in the step S4, the particles are extruded into round particles with a diameter of 8 mm.

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