Mason Antler Design Naturally Shed Organic Moose Antler Extra Large Dog Chew, 8.5" - 11.5" (For Dogs 60-100lbs, Recommended for the More Aggressive Chewers) Our chews are naturally shed and come from the wild where they steroid free and never given antibiotics. These naturally shed antlers are a healthy source of Calcium, Potassium, Phosphorus, Iron, Zinc, and Manganese. Antler chews are odorless and won't make a mess on your furniture or carpet like some chews do. These chews won't chip, splinter, or break like some raw and cooked bones do. These chews are lasting, and greatly satisfy your dog's need to chew and are a product of New England.