My 25lb Boston Terrier is an aggressive chewer who is a pro at destroying toys. On my quest to find toys that he loves and that can hold up to his playing, I've tried several Nylabone products and they work very well. I ordered one of these dino chews and got the stegosaurus, which my pup immediately began playing with. After a few days I noticed that the ends of the dino were getting pretty sharp, so I took a file and smoothed some of the sharpness and I've done this a couple times as he whittles the ends down. He loves this toy, and I do supervise him more heavily with this one because it is such a hard plastic and has an unusual shape, although he hasn't chewed any chunks of it off but he probably could if I didn't "fix" the ends for him. I think I may order another in hopes of getting the t-rex or brontosaurus, because those ones look like they would not get the sharp ends that the one I received does. That's really my only complaint about this toy, and so far my dog has no complaints.