Vet's Best Probiotic Soft Chews for dogs helps to support and maintain digestive health, which is a critical component of your dog's daily comfort and happiness. With 1.5 Billion CFU (Colony Forming Units) and active cultures of 6 strains of bacteria, Vet's Best Probiotic Soft Chews proactively maintain digestive system health by maintaining proper gastrointestinal balance to help support a normal, healthy appetite and proper digestion. Infused with Ocean Kelp, Ocean kelp contains natural antioxidants & prebiotics that help support the immune system & promote healthy digestion.