Shamrock Horse Block is a horse lick that contains natural calcium from lithotamnium, a red seaweed. It will balance the horse's diet, while improving its overall health. Shamrock Horse Block contains a full spectrum of minerals, trace elements and vitamins necessary for optimum health. The formulation of the product makes it suitable for all type of horses, from racehorses to stallions, broodmares, event horses, old horses and foals.