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The ass is a herbivore animal with strong disease resistance, resistance to rough feeding, easy feeding, good management, rapid reproduction, and stocking and captive breeding. The investment is small and it is suitable for small-scale fattening and rearing of farmers. Autumn and winter can use 5-6 months cycle to buy donkey fattening, small donkey finishing weight up to 150 kg -200 kg, asses up to 250 kg -300 kg. A stalled meat donkey can earn 600-1,000 yuan. 1. Fattening donkey selection. Preferred Guanzhong donkey and Texas donkey. Guanzhong donkeys are produced in the Guanzhong Plain area of ​​Shaanxi Province. The weight of fattening can range from 250 kg to 290 kg. Texas donkeys are produced in Dezhou, Shandong, and the fattening weight can reach about 260 kilograms. 2. Fattening stomach before fattening. After two or three days of stability, the large and small donkeys can be wormed and stomached. The “insect nemesis†was used to drive out the parasites in the donkey. The oral dose of the powder was 0.1 g/kg body weight, or the subcutaneous injection of the injection was 0.2 mg/kg body weight, which should be performed within 5–7 days after castration. The main purpose of the stomach is to use stomachic drugs to stimulate donkey taste receptors and promote the absorption of nutrients. The stomach is usually taken after 3 days of deworming. Each donkey takes 60-100 grams of oral salt or 450 grams of oral Jianweisan. 3. Little donkey fattening and feeding. Donkeys purchased from foreign countries should be trained to gradually adapt to local feeding conditions on the basis of mastering the feeding of the original feeders. In the beginning, corn, wheat, millet, etc. can be ground into flour. After being mashed, a little sugar is added to induce the feed. After a few days, 80-100 grams will be fed daily and gradually increase to 100-200 grams. After 2 months, 500-1000 grams will be fed daily, and gradually increase. It is advisable to feed 3.5 kg daily after 9 months. The entire period of fattening is 500 kg of concentrate. 4. Ass donkey rearing. Newly purchased donkeys from other places must first feed some digestible feeds such as grass and wheat bran. After a few days, enter the feeding period after the grazing is normal. The mixed feeds in this period were mainly cereal straw, soybean meal powder and corn stalk. Mixed concentrates include: bean cake 50%, cornmeal 30%, bran 20%. Some donkeys may not like to feed on the above feeds or do not eat them at all. They may tame the food with a small amount of ingredients, and they will automatically feed after about 7 days. The fattened donkey can feed 2 times a day in one day, only roughage at night, and 80% can be fed. After 2 months of raising, they were then slaughtered and sold according to the lyrics and market prices of the donkeys. In addition, the refined and roughage used for fattening adult donkeys should also be selected based on local natural resources and market conditions. For example, roughage can be used for cottonseed, wheatgrass, soybean meal, cornstarch, etc. The concentrates can be used for soybean meal and peanut cake. Bean cakes, either with cooked sorghum or with soy flour and grass. During the fattening period, it is necessary to limit the movement of donkeys, keep the pens and the environment clean, dry and sanitary.