This daily probiotic formula provides both prebiotics (mannan oligosaccharides) and probiotics (Saccharomyces c.boulardii 1079 and Saccharomyces cerevisiae 1077) to support digestion and hindgut health. The prebiotics nourish the "good" bacteria in the gut, and support the digestion of fiber. The probiotics are important for maintaining proper pH levels, absorption of nutrients, feed efficiency and immune health. This formula can be helpful in horses that have difficulty maintaining weight, are susceptible to hindgut issues, or frequently have a loose stool.