Outlast supplement contains a unique blend of ingredients that are designed to support gastric balance, giving you and your horse the confidence to perform Horse supplement is formulated to support gastric health and proper pH Field-tested and horse-approved; as part of our rigorous testing process, hundreds of performance horses around the country participated in our nutrition research Research shows horses enjoy Outlast supplement top-dressed or fed as a snack before a stressful event Provides an affordable tool to support your horses gastric health Purina's Ph.D. Equine Nutritionists have spent hundreds of hours (and counting) researching Outlast supplement at our state-of-the-art nutrition research farm in Missouri Comes in a 40 lb. horse supplement package Pelleted supplement is great for any life stage, including active pleasure, breeding and growing, performance, senior and special needs