Are you referring to raw bones? I have thought about using them, but never have. I use the nylabones.:shocker: to the pic of those teeth.....we just use bones, bones and more bones. have never had an issue with all the dogs we have had. Even the rescue's with bad teeth had great improvement. And one rescue had such bad teeth she had two removed and lived with us for eight years longer chewing bones happily and having lovely teeth