Farnam Vita-Min E & Selenium Antioxidant Soft Chew Horse Supplement, 3-lb bucket; With a combination of vitamin E and selenium, the Farnam Vita-Min E & Selenium Antioxidant Horse Supplement supports your equine partner’s immune system to keep him as a healthy as a horse. This supplement supports horses who are in intense training and competition. This nutritional support can aid in muscle health and recovery and help your horse maintain an ideal body condition for the show ring. Crumbles are easy to feed and are suitable for all classes of horses.