Fox is one of the internationally recognized rare fur animals, and it is kept in many countries in the world. It belongs to carnivorous monogastric animals and needs to be formulated according to nutritional requirements and feeding standards as well as local feed conditions. At the same time pay attention to the complementary effects of various feed proteins, physical and chemical properties, etc., in order to improve the nutritional value and utilization of feed. (a) fox diet feed 1. Animal feed: including all kinds of small trash fish, miscellaneous livestock and poultry, all kinds of wild small animals, such as rats, cockroaches, fly maggots, frogs and so on. Fish meal, bone meal, blood meal, silkworm meal, etc. can also be used as dry animal feed. Animal feed generally accounts for 45% to 65% in diets. Fresh meat, livestock and poultry waste can be directly fed after washing and smashing; fish feed, fish with more protein mucus on the surface (such as loach) should be first hot water scald to remove mucus, dried fish should be soaked Desalting, washing and crushing after feeding; cocoon processing to be thoroughly soaked to remove the residual alkali, after cooking and meat, fish smash feeding; 蚯蚓 dig from the soil and put water to raise 1 to 2 days. Let it drain the mud in the digestive cavity, wash it with clean water, and cook it with minced meat. 2. Plant feed: Includes various grain and oil crops and by-products. Such as corn flour, sorghum flour, wheat bran, bean cake, peanut cake, cottonseed cake and so on. There are also a variety of vegetables, fruits, wild vegetables and so on. General cereal feeds account for 35% to 50% of the diet, fruits and vegetables account for 5% to 10%. Cereal feed cornmeal, wheat bran, bean cake, etc. are mixed together and put in a pot. They should be fully cooked, heated to 100°C, and fed for 5 minutes. Fruits and vegetables should be washed and fed. 3. Additive feed: (1) vitamin feed. Use more cod liver oil, yeast, malt, cottonseed oil and so on. Cod liver oil is the main source of vitamin A and vitamin D and is used to feed cod liver oil at 800 to 1 000 international units per day. The feeding method is to drip the fish liver oil into the food bowl after eating. If liver and marine fish are fed all year round, cod liver oil is not necessary. Wheat sprouts are rich in vitamin E, and contain minerals such as phosphorus, calcium, manganese and a small amount of iron. They are an indispensable feed for fox reproduction. Foxes need enough vitamin C during pregnancy and lactation. This mainly comes from vegetables. If there is a lack of vitamin C, the mortality of young foxes is high. (2) Minerals add feed. Mainly calcium, phosphorus and sodium chloride, if calcium, phosphorus deficiency, young fox development blocked, susceptible to rickets. Therefore, it needs to supply its bone meal and salt all the year round. Especially in the breeding season, it is more important for mother foxes and bred foxes. Generally, it takes 10 to 15 grams of bone meal per day. Salt is necessary for animals to maintain normal physiological activities. Generally, it takes 2 to 3 grams per day. If seaweed fish is used as the main diet in the diet, no salt or salt is added to the diet. (3) Antibiotics add feed. It is mainly an antibiotic made from terramycin, which can play a role in inhibiting microorganisms and preventing some diseases. It can also promote growth and increase the survival rate of young foxes. (b) fox's diet fox's diet ratio there are two main methods, namely the ratio of heat and weight ratio. When preparing, the full price and freshness of the feed must be guaranteed. 1. Heat ratio method: This method is based on thermal energy. Determine the proportion of heat energy and the corresponding feed weight for each feed in each 0.42 megajoule heat energy, then calculate the total supply according to the total heat energy standard, and finally calculate the supply of protein. For trace additive feeds that do not have an energy value or a low energy value, they may be omitted and the supply amount is only calculated based on the number of feeds. 2. Weight ratio method: This method is based on the weight of the feed. That is, first determine the percentage of each feed in the total diet weight, then calculate the supply of various feed, and finally calculate the protein content of the diet to check the feasibility of the diet. This method is easy to calculate and easy to grasp, and is suitable for use in production fields and specialized households. It should be noted that there is no essential difference between these two methods. The actual verification is that the two can be mutually converted. The conversion ratio is approximately: when the animal feed heat law is 1, the gravimetric method is 0.8; the grain feed heat When the method is 1, the gravimetric method is 0.5; when the fruit and vegetable feed heat method is 1, the gravimetric method is 0.4. (College of Animal Science and Technology, Shandong Agricultural University, Post Code: 271018)