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1, seed selection stage: to choose the leg height, body length, body shape, plush fine dense, hairy needles black flat, male testicles large and flexible, female licking tits more and large; docile temperament to stay as a pod. 2, breeding preparation period: the end of November - the end of January this stage can be a day meal, feed animal feed in high proportion of some appropriate vitamin supplements, such as: B1, cod liver oil, E, try to make more activities. 3. Seedling period: From the end of January to the beginning of March, most of them are concentrated in mid-February or late. Feed and mating preparation periods are basically the same. Mainly, the public can make up some eggs. The ejaculation is later, the second year is usually 10-20 days in advance. When the eel is in heat, it is generally reduced. At this time, the vulva of the mother-in-law should be checked. Usually, the vulva should not be exposed. The pubic hair should be separated during the early estrus. When the oestrus is normal, the vulva is swollen and large. Part of the valgus, at this time to put appropriate conditions, up to match. 4. Pregnancy: First, the litter box must be disinfected, the market should remain quiet, and the general pregnancy period is 60 days. During this period, feed 2 meals a day and add some nutritious feed, such as: chicken liver, goat liver, eggs, Cattle, goats' milk, etc. are used to ensure that Aberdeen's aunts grow robustly in the mother's abortus, and the post-natal survival rate is high. For the purpose of 4-5 days before delivery, straw can be used to produce straw. 5, lactating period: the feed ratio and the basic period of pregnancy are basically the same, but when feeding more cattle and goats milk or soy flour, soy milk and the like, food should be thin, Tsai 8-12 days blink; 20- 25 days will eat: 45-60 days weaning split nest. 6, the young cub breeding period: generally divided into two stages, the first two months of animal feed to account for 40% to 50% of the ration, can be gradually reduced to 20%, to 10-10 months into a large maggot. 7. Skin peeling method: Take the skin at the end of November, hit it with a wooden stick against the head of a cockroach, or die with an electric shock, and you do not need to peel the skin. The first is provocation, picking the knife from the back foot to the anus. Place another foot root, pick it up to the tip of the tail, peel off the hind legs and tail, peel off the skin from the hip to the head and peel off the skin, then place the holster under the tip. Use a blunt knife or bamboo knife to scrape the oil on the wood. Use a wheat bran or a sawdust to wipe the skin with a slick. Put on the squeegee. Put the yin to 5-10% dry. Then remove the sampan and turn it over. Can be sold. 8. Disease prevention and control of cockroaches: Cockroaches have strong resistance to disease, and often clean and regularly disinfect and eliminate mosquitoes and flies in the summer. Do not feed moldy feed, drinking water should be clean, contaminated water should not be used for drinking, animal feed should be cooked at high temperature, and diseases should not occur easily. However, due to the limited conditions of artificial rearing, different conditions for human rearing and illnesses occur. Fatal disease is the main source of infection for dogs with "canine warm" and "canine parvovirus". It is also known as sick dogs. Poisonous diseases have occurred and diseases have occurred. Although there are currently several pharmaceutical companies in China who have developed these two drugs, the efficacy is not very good. Because “dog warm†and “viral enteritis†are highly contagious diseases and there are no specific therapeutic drugs, only vaccination is the fundamental method to prevent these two diseases. At present, there are special agricultural products sold by the Chinese Academy of Agricultural Sciences in China. The “Canine Warmer†and “Viral Enteritis†single vaccines developed by the company and the “Canine Veterinary Seedlings†developed by the Fourth Military Medical University can prevent the occurrence of these two diseases. The larvae were vaccinated at the vaccine two weeks after weaning. At the end of the month, early in January, the vaccine will be used. Other minor diseases can be treated with common drugs.