Formula 707 Weight Gain is a highly palatable, calorie-rich supplement specifically formulated to help all types of horses gain and maintain weight. Vegetable fat provides concentrated and easily digestible calories in a form that also increases a horse’s overall energy. High-quality protein provides all the essential amino acids a horse needs to rebuild lost muscle, and fiber keeps the digestive machinery working smoothly. Calcium and phosphorus have been added to assist in the important task of skeletal maintenance and, along with zinc and copper, energy metabolism.