quilibrium Optimal is a low calorie, low sugar/starch, nutrient dense pellet with elevated protein (amino acids), minerals and vitamins, containing up to 5 times the vitamin-mineral content of most feeds. This supplement is also classified as a ration balancer. Optimal is formulated for broodmares, growing horses, performance and leisure horses, including pony and miniature mares and foals.. This recommendation is based on feeding Optimal along with a typical horse forage.