50lb Impact Horse Hay Stretcher - WHEN GOOD FORAGE IS HARD TO FIND When hay quality is inconsistent, your horse’s nutrition doesn’t have to suffer. Provide your horse with a consistent and easy-to-use premium forage replacement with IMPACT® HAY STRETCHER Horse Feed. 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® IMPACT® 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.