*Now with Outlast Gastric Support Supplement Since 1894, Purina has been helping horses live up to their fullest potential. Impact(R) Professional delivers premium nutrition that is optimized for your performance horse to meet the demands of the equine professional. With over 100 years of expertise and research in equine nutrition and a dedicated team of Ph.D. Equine Nutritionists and Equine Veterinarians, nobody knows more about horse nutrition than Purina. Purina(R) IMPACT(R) is formulated to deliver premium nutrition with only high-quality ingredients that have been proven through years of feedings to support overall horse health and performance. See the difference IMPACT(R) Professional feeds can make with your horses. | Purina - Impact Professional Performance | Size 50 lbs