This antler is likely to withstand weeks to months before it needs to be replaced. Our Medium Deer Antlers are ideal for medium (30+lbs) dogs who are powerful chewers. An antler of this size will likely withstand weeks to months of regular chewing before it needs to be replaced. Antlers are extremely dense and hard - we do not recommend them for dogs with underlying dental problems. Deer antler is the densest antler we carry, the extremely hard outer layer is thicker than the softer core marrow. Compared to elk, which has a larger, more porous core, relative to the hard outer layer.