(Purina Veterinary Diets) FortiFlora Canine Nutritional Supplement contains a special strain of probiotic that has been proven to promote intestinal health and balance. The live active cultures in FortiFlora are recommended for the dietary management of dogs with diarrhea. May help manage diarrhea caused by stress, boarding, diet change, consumption of inappropriate food, antibiotic therapy or soft stool in puppies. FortiFlora contains high levels of antioxidant vitamins A, E and C to promote a healthy immune system. Sprinkle over food.