I think it may depend on what type of deer, elk, moose, etc the antler came from. I bought two, I can't remember what they are, and they are hard as rocks. Mine have not penetrated them yet. The ends are just ground down a bit. It may also depend on what time of year they are harvested.
They are great I bought my girl one and she loves it !! , cost me about $14 for a smallish one and I was told they are edible as well
Same goes with a "rawhide" I got her a Bosleys ,it's made %100 out of potato so it's also totally edible
It's lasted her a good week and a half maybe two since she's got a quarter of it left
But I love love the deer and or elk antlers whole or split lol she decided which one
Well Tilly certainly likes Deer atlers too - last time we took her a walk in the woods directly behind our house she disappeared into some bush, and appeared with some antlers in her mouth - unfortunately they were still attached to a well-rotted head…. so she didnt get to keep them...
Haaahaaa! just gotta love the canine heart!/stomach!!! better she trotted off with them rather than just rolled in it and have you wonder why she smelled so bad while she was up on your couch/bed….!:)