Eighty-four growing pigs with initial weight of 36.973.0 kg were assigned to treatments in 2*3 factorial arrangement of dietary treatments plus 1 [two levels of CP, 18% and 15.5%, and three levels of SO, 1.5%, 3.0%, and 4.5% with all pigs kept at room temperature of 32 C, and an additional treatment (control) with 18% CP and 1.5% SO with pigs kept at 22 C], in a randomized block design with the block being the initial weight.