Spillers Gro N Win Stud Balancer is a nutrient rich formula designed for safe, even development whilst maximising growth. This food can be fed to lactating mares, foals, youngstock & stallions. Cereal grain free, low in starch & sugar. Nutritional Info. Digestible Energy (MJ/kg) 12, Oil (%) 5, Protein (%) 32, Fibre (%) 5, Starch (%) 7, Vitamin A (iu/kg) 44000, Vitamin D (iu/kg) 4400, Vitamin E (iu/kg) 1500, Selenium (mg/kg) 1.5, Copper (mg/kg) 175 & Zinc (mg/kg) 450