Whitetail antlers are the fastest growing tissue known to man. And whitetails CRAVE minerals, especially the phosphorous and calcium that they need for antler growth. From the time they drop their antlers in late winter and early spring until they shed their velvet in the fall is the heaviest use period. The GameKeepers offer tips on placement, availability and replacement cycles. They'll also explain how to use them in conjunction with game cameras to keep track of your herd.