diet with 0% wheat bran was formulated as the basal diet. Two other experimental diets contained 9.65% and 48.25% wheat bran, which was added at the expense of corn and soybean meal to provide the graded levels of dietary fiber (Table 2). Vitamins and minerals were supplemented in all diets to meet or exceed the estimated nutrient requirements for growing pigs recommended by NRC (1998). Chromic oxide (0.3%) was included in all diets as an indigestible maker.