At 4 months old, a foal needs 40% more lysine (milk protein) than an adult horse. 2 to 12 provides optimum levels of the essential amino acid lysine, vitamin E and selenium to help young horses reach their maximum growth potential. Formulated with cool energy so extra calories do not overheat the horse. Each 2.2 lbs contains 37% protein, 12% fat, 360,000 IU vitamin A, 135,000 IU vitamin D, 6,880 IU vitamin E, 2,140 mg choline, 8,250 mg potassium, 1,600 mg sulfur, 1,350 mg manganese, 1,320 mg iron, 425 mg copper, 1,700 mg zinc, 13.25 mg selenium, 2,140 mg choline, 425 mg niacin, 3.5 mg biotin, 16,400 mg phenylalanine, 13,100 mg glycine, 6,400 mg tryptophene, and more.