Caged chickens are confined to small cages, isolated from the soil and lacking in exercise, and are therefore susceptible to the following three conditions. First, cage chicken fatigue: mainly due to chicken dietary calcium and phosphorus and VD deficiency, or improper ratio of calcium and phosphorus, chicken lack of exercise and other long-term cause. Occurred shortly after opening or early egg production. The diseased chicken is often lying on the side of the cage and cannot stand. Afterwards, it is unresponsive. Many chickens suffer from fin and leg fractures, and the bone wall is thin and brittle. Control methods: Insist on feeding compound feed or adding appropriate amount of VC and VD in the early stage of egg production. The available phosphorus in feed can be kept at about 0.45%. At the same time landing on the ground, often get good results. 2. Fatty Liver Syndrome: The cause of the disease is unrestricted feeding before the start of production. The dietary energy is too high, and the lack of methionine, choline, VB12 and other lipophilic factors, as well as the presence of some molds and mycotoxins, impede the neutral fat. The function of synthetic phospholipids leads to accumulation of neutral fat in the liver. Fatty liver syndrome often occurs in well-fed chickens, and most chickens have good body conditions. The sign of the onset is that the egg production gradually declines or the chickens do not reach the peak of the egg production. Some chickens suddenly died, mostly due to the bleeding of the liver caused by rupture of the liver. The necropsy shows that the liver is tan-brown, with a brittle texture, small bleeding spots on the surface, and a lot of fat on the surface of the body cavity and intestines. Control methods: Feeding should be restricted before laying eggs to control the weight of the chickens. After opening, increase the protein level by 1%-2%, and add a certain amount of wheat bran, because the wheat bran contains the necessary control of chicken fat metabolism. factor. For over-fat chickens, 55 g of choline, 0.33 mg of VB12, and 50 g of methionine were added per 100 kg of feed to promote neutral fat synthesis of phospholipids. Third, the egg drop syndrome: Mainly occurs in the egg chicken and meat breeder chicken, and the production of brown shell egg layer chicken is the most common. Generally before and after the peak of egg production, the drop rate of egg production is 17%-56%, and the quality of the eggs is generally reduced. Soft shell eggs, thin shell eggs, light brown eggs, colorless eggs, waist drum eggs and brown eggs are present. The hatching rate of hatching eggs decreased, the mortality rate increased, the hatchlings had weak viability, and the mortality rate was high. The diseased chickens excreted wet feces and green feces, and their cocks were blue and purple. They were very neurotic but they did not reduce their intake but sometimes they increased. The necropsy showed the liver was blue and firm, the gallbladder was atrophic, and the bile was small and thin. Prevention methods; increase protein levels in feed, should be maintained at 18% -19%, and add choline VB12 to protect the liver. Control of infection can add 0.02% oxytetracycline or 0.2% furazolidone. Vaccination against egg drop syndrome can be given during the prevention.
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