Abstract
1. The requirements of the 3‐week‐old turkey for the sulphur containing amino acids and for threonine were estimated to be 0.83% and 0.94% respectively in diets containing 12.5 MJ ME/kg. 2. It is suggested that the growth responses of rats and slow‐growing chicks and of fast‐growing chicks and young turkeys to daily intakes of the sulphur containing amino acids and of threonine are similar.