What are the needs of vitamins in winter chickens?

The vitamin requirements of poultry depend to a large extent on their physiological condition, age, health, nutrition and production purposes. For example, because of the high hatchability of hens, the levels of vitamin A, vitamin D3 and vitamin E in their diets are higher than those of fast-growing broilers.

The amount of vitamins required by different animal breeds and strains may also vary. The new line is high in AAT龌龊W and the demand for vitamins is also high. Rapidly growing broiler leg disease can be partially improved by adding high levels of biotin, folic acid, niacin and choline to the diet.