Wow, and I thought Scooter was a super chewer. I'm stumped for an answer as to what a really agressive chewer should use. I saw in a Doctors Foster and Smith catalog that they have toys for agressive chewers but they look to be all rubber or something like that. I've yet to have a dog that will chew on a rubber or plastic toy. Gee what gives these little darlings such strong mouths? Seriously, I also have a 25 pound terrier mix and she doesn't chew anywhere near as hard as Scooter.