Bark N Scratch Outpost is proud to carry CST Antlers in Milwaukee, Wisconsin. All natural Antler Dog Bones are sheds from elk and deer. Every spring the elk and deer shed their antlers and begin growing a new set. The elk and deer are never harmed in this natural process. Antlers are odorless and mess free. Antlers, when sized correctly, do not splinter, which makes them a safer chew.