On the 1st to 11th days of the restricted diet, feed is stopped, light is applied for 8 hours, and water is stopped for the first 3 days. From the 12th day to the 13th day, 40 g of feed is given each day, and the light is supplied for 9 hours. The 14th day~20 Each day, feed 10 grams per day until free food is resumed. Light is increased from 9 hours per day, 1 hour per week, to 16 hours per day. Compulsory moulting chickens must be healthy. After the moulting is over, the feathers, excrement, and grass are cleaned up, immunized in time, and transferred to normal feeding.
The chemical method is mainly to add or reduce a certain amount of chemical agents such as zinc, calcium, salt, etc. in the chicken's feed. After a certain amount of time ingesting excessive or insufficient amounts of chemicals, the chickens suffer from metabolic disorders and dysfunction of internal organs, resulting in the suspension of production and moulting of hens. After removing the chemical preparations, the hens are rested and their physique restored, and the second egg production period is resumed again under the condition of feeding the egg-laying layer chickens. At present, the most used chemical method is to feed high-zinc diets.
The hormone method promotes suspension of production and moulting by injecting hormones into muscles of hens. Using this method, chickens freely eat and drink, shortening the light to 8 hours in the first 12 days. For example, after injecting 30 mg of progesterone intramuscularly into the hens, the main wing and ailerons are quickly replaced, and the eggs are laid 41 days to 48 days after the moult. The egg production of hens treated with this method is slightly poorer. Hormonal methods are rarely used due to metabolic disorders caused by the hormones that inject hormones easily destroy the balance of hormones in the body.
Animal husbandry law Animal husbandry law is currently the most commonly used and best method. By cutting off water, cutting off materials, and cutting off light, artificially exerting stress factors on chickens disrupts the normal life of chickens, causing sudden physiological stress on chickens, unbalanced secretion of hormones, and reduction of estrogen in the ovary, resulting in atrophy of the follicles. Caused suspension of production and moulting.
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