Abstract
1. Five diets containing different amounts of protein (178, 210, 243, 275, 308 g/kg) were fed to broilers reared at 16, 21, 26 and 31 °G from 27, 21, 11 and 1 d of age, respectively. 2. Feeding the diets with increased concentrations of protein apparently does not reduce the growth rate depression of the broiler reared at 26 or 31 °C.