My dog Munchkin "Munchie" loooves to chew things. I have to buy her a lot of chew toys that are "dura" and she can usually kill these chew toys relatively quickly. The problem with these particular shapes is that she focused her chewing on the feet of the dinosaurs (I bought more than one.) So, all that chewing and she completely ignored the rest of the dinosaur and all its raised bumps -- it was all about the feet for her which she decimated in about ten minutes. Keep in mind she weighs 9lbs. The design of these are bulky and don't really allow for the dog to get a good handle on them to chew.