THIS ITEM SHIPS GROUND ONLY Provides added nutrition in; Epiphis, a secondary bone forming center separated from parent bone. Epiphysitis, inflammation of Epiphyis, ESP, at the hip, knee and shoulder in foals. For horses of all ages. Contains calcium and phosphorus in particular balance along with Vitamins A and D3 to promote bone growth and strength factors for foals and mature horses on a deficient ration, grazing in mineral poor pasture, and for horses undergoing the stress of training, racing or performing.