Purina(R) Ultium(R) Gastric Care horse formula helps equine athletes during the stress of competition by providing optimal gastric and immune support. Purina(R) Ultium(R) Gastric Care horse formula was developed by Purina's Ph.D. Equine Nutritionists and Veterinarians to provide consistent support during times of stress. This feed is the culmination of decades of Purina equine nutrition research and contains specialized ingredients designed to support a healthy gastric environment and immune system. | Purina - Ultium Gastric Care | Size 50 lbs