What are the breeding methods for rapid fattening of Boer goats?

Goats raised in rural areas weigh no more than 15 kg at 12 months of age, and native sheep weigh around 25 kg at 12 months of age. The reasons for slow growth: first, inbreeding leads to physical degeneration; second, deworming is neglected, consuming a large amount of nutrients; third, no scientific feed formulation is used, so the nutritional needs for sheep growth and development cannot be met. To make mutton sheep grow fast, the following techniques must be mastered:

1. Selecting breed sheep. China has no meat-type sheep breeds yet, so it is only possible to introduce large-bodied, high-meat-yield foreign breeds and excellent domestic breeds and use artificial insemination with local native sheep to obtain crossbred commercial mutton sheep. For example: crossing Boer goats with local goats. Crossbred sheep show strong heterosis, grow fast, have strong disease resistance, and have a high feed conversion rate. 2. Deworming. Sheep should be dewormed before fattening. Use the highly effective dewormer levamisole, at 8 mg per kg of body weight dissolved in warm boiled water to make a 5% aqueous solution, for intramuscular injection, which can expel various roundworms and nematodes in the sheep's body; use bithionol, at 80 mg per kg of body weight, add a little flour and mix with 250 ml of water, and administer orally on an empty stomach, which can expel sheep liver flukes and tapeworms; after shearing, use a 1%-2% trichlorfon solution for medicated bathing to eliminate external parasites. This avoids extra nutrient loss in sheep and ensures the fattening effect. 3. Scientific feed formulation. Two relatively practical feed formulas are introduced as follows: (1) cornmeal 45%, rice bran 20%, soybean cake 10%, cottonseed cake 15%, wheat bran 12%, soybean cake 30%, salt 1%, fish meal powder %, after weaning, lambs are fed 150 g per day, and as the age in days increases, the daily feeding amount can be increased to 200 g, at 6 months of age feed 400 g, at 7-8 months of age feed 500 g per day. Either of the above two formulas can be selected, and sheep fattening is based on green hay, sweet potato vines, and corn stalks as the basic diet, with the mixed feed used only as a supplementary feed. 4. Adding feed additives. Commonly used additives include the following: (1) Sheep Fat Compound Feed Additive. It is composed of trace elements, rumen metabolism regulators, growth promoters, etc. It is suitable for fattening sheep of the current year as well as culled rams and old, weak adult sheep. For grazing sheep supplemented with concentrate and mixed feed for fattening for 90 days, the average daily gain is 137 g, which can significantly improve the fattening effect and economic benefits, shorten the fattening period, and save feed. (2) Monensin sodium, also known as rumensin. Its function is to control and improve rumen fermentation efficiency, thereby increasing the rate of weight gain and feed conversion rate. The dosage is 25-30 mg added per kg of diet. (3) Olaquindox, also known as kuiyuling, is a synthetic antibacterial agent. It has the effect of promoting protein assimilation, and 50 mg is added per kg of diet. (4) Urea. Its purpose is to supplement the deficiency of protein in the feed, and it is mixed into the concentrate at 1.5%-2% for feeding. The daily feeding amount accounts for 0.02% of the sheep's body weight, that is, 10-15 g per day for adult ewes, 6-8 g for young sheep over 6 months of age. The first feeding amount can only be 1/10 of the specified amount, and then gradually increased. After 10 days, it can be increased to the specified amount. To prevent urea poisoning, urea must not be fed alone, nor dissolved in water for feeding, and the sheep should not drink water within half an hour after feeding. For sick sheep and weak sheep, feed less or not at all. If a poisoned sheep is found, administering 200-500 ml of 0.5% vinegar or 1-2 kg of yogurt orally can rescue it. 5. Disease prevention and control. Common diseases in mutton sheep production include: lamb dysentery, with symptoms of reduced appetite, diarrhea, foul-smelling feces, and inability to stand up. Prevention and treatment: feed 0.15-0.2 g of antibiotic 12 hours after birth, and for diseased lambs use furazolidone, 0.01 g per kg of body weight orally. Enterotoxemia manifests as acute watery diarrhea, falling down and lying prone, difficulty breathing, foaming at the mouth, and head tilted backward. For prevention and treatment, regularly inject triple vaccine for sheep braxy, enterotoxemia, etc., and for diseased sheep intramuscularly inject 800,000-1,200,000 units of penicillin. In addition, rumen bloating and pneumonia should also be more strongly prevented and controlled.