One of my dog's gums bled while chewing this sharp item. Another dog enjoyed it and it kept her occupied, butI am concerned about the pieces they chew off. They likely swallow those pieces and how safe is that? There are better, safer things to chew and clean teeth. Look up the CET chews. Marrow bones in the butcher case are better and offer nutrients as well. I would not buy any Nylabone chews ever again. Don't be swayed by the low price. You get what you pay for.