Tough call...
Belle has bad teeth, she's actually lost about half to resorptive lesions. I usually take a cleaver and choppity chop her bones in with her meat for her meals (I don't have a grinder). HOWEVER, before I go all samurai on her meals, I try to get her to make an effort on the chicken rib bones. I'll usually cut them into strips, cross bone, so they are like small rib strips. Sometimes she'll manage them, sometimes not. Anything larger than rib bones are a no go for her.