Mine get cow knuckle bones. They are raw of course and very substantial. I've never had an issue yet, I tried the kongs and antlers etc, but he dogs ignore them after a few minutes.
I took the dogs for a run to a slough at the back of the farm One of them found a dinosaur bone
that has been there for years. It might as well have been a dino bone the way she treasured it.
Had a lab that was a rock hound. He literally bought hundreds of stones to the house over the years. By the time he passed he had broken or worn down a few teeth.
