My 25lb. Jack Russel/King Charles mutt can chew through the burliest Kong toys in minutes, so I was skeptical when I first brought the Tux home. This toy is FANTASTIC! The first one he had took him months of consistent chewing to make a dent in. I got him a new one and, try as he might, it's still hanging tough. I think the shape is really smart because he can't get tiny little nippy bites on it, which is usually how he tears things apart. I will continue to buy these and I hope they'll always be in production!