Experiment 1: Four barrows (DurocLandraceLarge White) with initial BW of 14.21.4 kg were used to determine the DE and ME contents of the three soybean products. Pigs were allotted to four experimental treatments in a 44 Latin square design. Four diets were formulated to determine the DE and ME contents of soybean products (Table 2). In the first diet, corn was the only energy source (96.45% corn and 3.55% minerals and vitamins) and this diet was used to determine the DE and ME content of corn. In the remaining three diets, 25% of one of the three soybean products was substituted at the expense of corn and the energy values of the soybean products were determined by difference on the assumption that their contributions were additive (Adeola and Bajjalieh, 1997; Woodworth et al., 2001).