The other two groups (one basal diet group and one NAC-diet group) were raised at 30 ± 1◦C (from day 8–14 of age) and 26 ± 1◦C (from day 15–35 of age) as thermoneutral groups. Average daily gain (ADG), average daily feed intake (ADFI), and feed to gain ratio were calculated. Mortality was recorded by daily visual observation.