The results showed that piglets fed the FSBM diet had higher ADG (P < 0.05) and FGR (P < 0.05) than piglets fed raw soybean protein (Table 3). ADG and FGR in piglets fed FSBM increased by 8.33% and decreased by 5.56%, respectively, compared to piglets fed SBM. Piglets fed FSBM had lower (P < 0.01) levels of serum IgG than piglets fed SBM (Table 4). There was no difference in the level of serum IgA and IgM between the piglets fed FSBM and SBM