Vitamin Units of Measurement. Vitamin D 3 Synthesized by chicken getting U.V. light. Deficiency results in rickets, thin egg shells, reduced growth, weakness, ataxia. Vitamin E A natural antioxidant for preserving fats in feeds and body tissues. Deficiency typified by excess bleeding, egg spots, anemia, excess bruising.
Requirement is accentuated when feeding diets low in the amino acid tryptophan.
Deficiency results in anorexia, poor growth, tremors, convulsions, reduced egg production and hatchability. Sources include meat meals, leafy meals, most grains and soybean meal. A deficiency results in anemia, reduced growth and performance, high mortality, and reduced hatchability. Feed sources include most animal meals, but plant feeds contain little B 12 . Only microorganisms can synthesize the vitamin.