The intestinal tracts of dogs, cats, and horses contain trillions of bacteria that, in a healthy animal, coexist in a beneficial and symbiotic relationship. These beneficial bacteria promote healthy GI function, optimal bowel regularity, and normal immune response. Providing a companion animal with supplemental probiotic bacteria promotes a healthy intestinal environment by producing lactic acid and facilitating the production of fatty acids that are further helpful to the growth of other beneficial microorganisms. ThorneVET's Bacillus CoagulansVET represents a breakthrough in probiotic supplementation. Because this "good" bacteria is dormant until it's being digested, it resists being destroyed by stomach acid (like many probiotics) and reverts to a growing bacteria when it reaches the intestines. Each capsule contains 2 billion Colony Forming Units