Adding vitamins to the feed is good for the chicken in poultry cages for sale, but it should not be excessive, so as not to have a bad effect on the chicken’s body.

The main functions of vitamin A are: maintaining normal visual function, maintaining normal bone growth and development, and nutritional supplements. When the long-term or sudden overdose is fed, the dose exceeds the feeding standard, which can cause hypervitaminosis in the hen. It is characterized by depression or convulsions, and the feed intake is reduced. When it is serious, it does not eat and the feathers fall off.

Vitamin D maintains a stable serum calcium and phosphorus concentration. When the feeding amount exceeds the feeding standard, a large amount of calcium can be transferred from the bone tissue, and the calcium is absorbed in the gastrointestinal tract, and the blood calcium is increased. The calcium is deposited in the arterial wall, the joint, the renal tubule, the heart and other soft tissues. 

Vitamin E vitamin E can promote reproduction. When the amount of feeding exceeds, it will cause hens to have metabolic disorders and die of excessive fat or poisoning.

Vitamin K promotes blood clotting, so vitamin K is also called coagulation vitamin. Also involved in bone metabolism. When the amount of feeding exceeds, it stimulates the inflammation of the gastrointestinal mucosa of the chicken, which is characterized by a sharp loss of appetite and squatting, which leads to a decrease in egg production and a discontinuation in severe cases.

Regarding hypervitaminosis, it is mainly for prevention, and the chicken diet is properly prepared according to the feeding standard. For chickens that have had hypervitaminosis, they should stop feeding vitamins immediately and supply adequate drinking water. Generally, they can gradually recover in 1.5-2 weeks.