Farnam Weight Builder is the ideal supplement for the horse who is hard to keep. Weight Builder is a concentrated formulat that won't upset the horse's digestion. It provides horses with concentrated calories from flax meal. Flax is high in omega-3 fatty acids and other proteins, fats, and fibers with a balanced calcium-phosphorus ratio. Farnam Weight Builder helps horses gain weight and encourages a glossy, healthy coat. 8 lb granules in resealable tub.