Great Dog Antler Chews are made from 100% naturally shed elk antler from Colorado, Montana, Wyoming and Idaho. They are a renewable (antlers grow and are shed each year), healthy, all natural, odor-free and long-lasting chew that helps keep your dog entertained while assisting in keeping teeth clean. Plus, your dog will love them! Once collected, the antler is high pressure water/steam cleaned and all cut edges are sanded for safety. Choose the appropriate size for your dog based on weight--when in doubt get a larger size.