Equine Senior® Active Horse Feed Designed to meet the unique nutritional needs of your active senior horse. Formulated for active aging horses that can still chew and digest hay. Exclusive ActivAge™ Prebiotic Purina® Amplify® High-Fat Nugget – A proprietary blend of vegetable oils, flax seed and rice bran for weight maintenance, shine and bloom Controlled Sugar and Starch Vitamin & Mineral Fortification Highly Digestible Added Antioxidants – Contains Vitamin E to provide additional support for a healthy immune system High-Quality Proteins Available in a fifty-pound bag.