There are several reports about the effect of commercial protease or fermented soybean meal alone on the growth of monogastric animals. Dierick et al. (2004) reported that there was a non-significant trend for piglets to perform better (growth, F/G ratio) using a microbial exogenous protease in a soybean meal based diet. But, several reports showed that fermented soybean meal increased growth performance and improved F/G ratio in weaned pigs (Feng et al., 2007) and nursery pigs (Jones et al., 2010; Kim et al., 2010).