Each ring only lasts our almost 3 month old Golden Retriever puppy about 10 minutes, but he absolutely loves them! Great for teething and providing a few minutes of peace and quiet. Would love if they lasted longer, though. Probably best for smaller breed pups so you feel like you're getting your money's worth. That said, I will probably order more since he seems to like them so much.
Rating: [4 of 5 Stars!]