Abstract
The objective of this study was determine leucine maintenance requirement (Leu) and to evaluate the responses of broiler chickens and laying hens to the intake of diets with increasing Leu levels. For the maintenance study, two nitrogen balance (N) trials with 36 roosters each will be conducted. Assay 1 will consist of providing a Leu-deficient diet with Leu levels between 0 and 1.741%, w…