Purina Pro Plan FortiFlora probiotic supplement has been proven to promote intestinal health and balance as well as a healthy immune system. FortiFlora contains guaranteed levels of the probiotic strain Enterococcus faecium SF68 to provide shelf stability and to arrive alive in the intestinal tract. It Helps reduce flatulence (gas) in dogs and is proven to promote intestinal health & balance. Also contains antioxidant vitamins E, C and beta-carotene which have been shown to support a strong immune system. It may even increase a pet's desire to eat! Very easy to feed just sprinkle on your pet's food and your dog will eat it up!