It's not a bone, but my dogs favorite treat/chewy is the everlasting treat ball he is an amazing chewer and there's not one hole in the ball and the treat is hard, so takes awhile to get it out, put it in upside down for more of a challenge.
I love my two boys Smokey and Chief.
Smokey is that one of a kind dog. I
also really love my 4 precious guinea pigs.