Purina(R) Amplify(R) Supplement is a high-fat, controlled starch extruded nutritional supplement. When extra calories are needed to maintain body condition, Purina(R) Amplify(R) Supplement can be added to the horse's daily ration to provide multiple benefits. Nutritionally balanced - protein, vitamins and minerals to maintain the nutritional balance of the horse's total ration when added to a concentrate feed and forage diet. Shine & bloom - essential fatty acids promote optimum skin and hair coat. No trans-fats. Weight gain & endurance - 30% fat from rice bran, flax seed and vegetable oils provides extra calories and helps maintain staminaCalorically dense - controlled starch, calorie-dense formula allows you to feed lessMuscle performance - added amino acids help promote muscle growth & healthy hair coat, skin and hoovesOptimal absorption - proprietary extruded particle for easy digestion and calorie absorptionAdded antioxidants - including vitamin e to help address the damaging effects of free radicals | Amplify High-Fat Equine Supplement | Size 50 lb