Effect of Protein and Energy Level in Feed on Posthatch Chick Performance
R. Molenaar*, I.A.M. Reijrink*, R. Meijerhof*, J.K.W.M. Sparla‡, P.J.A. Wijtten‡
*HatchTech BV, Veenendaal, the Netherlands; ‡Provimi BV, Rotterdam, the Netherlands
Broiler chicks increase their body weight approximately 50-fold within 40 days of age. Because of this short life cycle, growth during the first week is important. This is also reflected in the positive relation between body weights in the first week and body weights at marketing (Nir and Levanon, 1993; Gonzales et al., 2003).