ANTLERZâ¢ hold up substantially longer than most traditional chews made from plastic, bone, or compacted starch. Unlike processed livestock bones ANTLERZâ¢ donât chip or splinter when they are being used by even the most aggressive chewing dogs. A dogâs chewing action grinds ANTLERZâ¢ down slowly. ANTLERZâ¢ are a 100% natural dog chew that contain no plastics, no petrochemicals, no empty starches or artificial flavors. ANTLERZâ¢ are not a by-product generated by a meat processing facility or slaughter house.