This style of chew is cut from the base of a Whitetail Deer antler. The base is the part of the antler that attaches to the head of the deer. The outer edge of a Whitetail antler is dense, but the center contains a softer marrow. The dense outside provides hours of chewing time, while the soft marrow is the reward that your dog will look forward too. This combination provides a great all purpose chew.