Besides improving DM recovery and aerobic stability, some silage inoculants are used to improve the digestibility of silages. Weinberg et al. (2007) speculated that some silage inoculants may compete with other microorganisms in the rumen for readily fermentable substrate resulting in less lactic acid causing a higher ruminal pH (Weinberg et al., 2003), which in turn could be favorable for fibrolytic bacteria in the rumen. As a result, fiber digestion in the rumen could be enhanced when cows are fed silage treated with an inoculant.