Hill's Prescription Diet Gastrointestinal Biome Digestive/Fiber Care with Chicken Dry Dog Food, Veterinary Diet, 16 lb. BagHill's Prescription Diet Gastrointestinal Biome DigestiveFiber Care with Chicken Dry Dog food is specially formulated by Hills nutritionists and veterinarians to support your dogs digestive health Healthy poop in as little as 24 hours Made with proprietary ActivBiome plus ingredient technology shown to rapidly activate beneficial gut bacteria and support a healthy GI microbiome balance Unique blend of prebiotic fibers to promote regular bowel