#1 Veterinarian Recommended Senior Horse Feed - Four out of five equine veterinarians recommend Purina's Equine Senior Horse Feed to their clients with senior horses, according to an independent study conducted in 2019 Exclusive ActivAge Prebiotic Technology - Patented formula includes ActivAge Prebiotic Technology scientifically studied in senior horses to support optimal function of the aging immune system and optimal mobility in aged horses; the controlled sugar and starch formula, along with ActivAge Prebiotic Technology, supports an appropriate metabolic response to feeding Purina Amplify High-Fat Nugget - Multiple sources of fatty acids including stabilized rice bran, flaxseed, and vegetable oils help support body condition, shine and bloom Outlast Gastric Support - Scientifically shown to support gastric health and comfort and proper pH Supports Digestion and Health - Easy to chew with highly digestible fiber to meet the needs of horses that cannot chew or digest long-stemmed forage Easy to Chew - Easy-Soak Pellet Technology for horses with worn or missing teeth, makes a soft, easy-to-chew mash when soaked in water Highly Fermentable Fiber Sources - Including beet pulp and hay to help maintain body condition and support healthy digestive function 100% Vitamins and Minerals - Support overall health of senior horses (When fed as directed, with free-choice or added salt, based on Nutrient Requirements of Horses; Sixth Revised Edition 2007, published by the National Research Council) Great horse feed for seniors and special needs horses Includes 50 lb. bag of Purina horse feed