It has been a success for us with all 4 pups for nearly 10 yrs. -- they love them and are pretty tired when they are done. Lambeau is getting a little guarding with his, so we have been working with him by taking it off of him while he is chewing, place it on the counter where he can see it, wait a few minutes, place him in a sit/stay and then give it back. I once went to take it from him and he growled, so we will have none of that... belly up he went and he lost the bone. Just something to watch for if you try them