Pup Probiotic is a synergistic blend of three strains of probiotics that come together to help balance out your dogs digestive flora. These three strains are soil-based which means they are naturally found in the earth and help with: balancing digestive bacteria improve leaky gut produce antioxidants lower inflammation in the body Our probiotic blend also contains a prebiotic, FOS, which is a food source for the beneficial bacteria so they can continue to reproduce inside your dogs digestive system. Ingredients: Bacillus coagulans, Bacillus subtilis, Bacillus clausii, FOS - Fructooligosaccharide, maltrodextrin from corn Each bag contains about a 2 month supply at 1/4 tsp daily.