Digestive Booster BagBalance from the inside out. A healthy gut is a happy dog, so our Digestive Booster blends 25 billion CFU of probiotics and prebiotic fiber with pumpkin seed powder to regulate digestion and soothe sensitive tummies. A touch of beef liver adds natural flavor and extra nutrients to keep mealtime both tasty and beneficial. Mixing couldnt be simpler: pour your Ruff Greens VitaSmart into the canister, add the Digestive Booster, replace the lid, and rotate