Horse to Foal 2X is a type B medicated feed dewormer that provides a convenient one-day treatment. It contains 1.0% fenbendazole, making it ideal for hard-to-paste horses, weanlings, and yearlings on feed. This dewormer controls large strongyles, small strongyles, pinworms, and ascarids. Apple flavored for easy administration, one 1 lb. bag treats up to 2,000 lbs. of body weight.