Some Bacillus species have the capacity to produce different exogenous enzymes including prote- ase, lipase, cellulase, xylanase, phytase, and keratinase (Hendricks et al., 1995; Monisha et al., 2009; Mazotto et al., 2011; Mittal et al., 2011; Shah and Bhatt, 2011; Jani et al., 2012). These enzymes may help to decom- pose complex feed molecules, improve absorption of nu- trients, diminish intestinal viscosity in nonstarch poly- saccharide diets, and decrease the amount of substrates available for growth of pathogenic bacteria. Addition- ally, it has been shown that the presence of Bacillus isolates, such as Bacillus subtilis, enhance growth of other beneficial microorganisms such as Lactobacillus by production of subtilisin and catalase and decreas- ing intestinal pH (Hosoi et al., 2000).