Brady got through an orbee bone. I really didn't think he could do it, but last night he was running around with a chunk of the end of one he has in his mouth. He is such a monster! LOL! He has two, and one is bigger than the other. The biggest one is still intact. It was the next size down that he was able to get through. That boy can be so determined. I just thought it was funny. Orbee tuff? Definently. Brady tough? Apparently not. He does love those things though, He chews and chews and they have been the BEST purchase I have made because the big one is still lasting and the medium one has lasted a long time up until yesterday. They are definitely worth it no matter how big a chew monster you have.