We have a 43 pound standard poodle who usually destroys rubber toys in under 10 minutes. This one is still in nearly perfect condition after 2 weeks. She ate her lunch from it first and didn't know it was a toy haha! I used it to play fetch with her inside, and she has been hooked ever since! It's fun how it bounces around in random directions when we throw it, or she drops it while running with it. It has quickly become my wife's, my, and my dog's favorite toy! She likes to use it to eat, retrieve, chew/gnaw, and chase around the house. I've been surprised at how clean it stays after all the use she's put into it already. I'm sure it will need to be replaced some day when she figures out how to destroy it. Then I'll definitely buy another Gnawt-a-rock! And you should too.