Performance and immune response of broilers born to breeders of different ages and fed different valine levels

Two experiments were carried out to evaluate the effects of digestible valine supplementation in pre-starter and starter diets on productivity, nutrient metabolizability coefficient (NMC), immune response broilers from breeders different ages. Experiments I II conducted with (1 7 days age) (8 21 phases, respectively. Broilers fed that differed their content. In each trial, 400 male Cobb [...]