This is the only thing I've found that he can't tear apart. He's trying his damnest though. It's an old Bridgestone BattleAx of my Kawi ZX7. He loves running around the yard with it in his mouth and I think he likes the way his voice sounds echoing inside the tire because he growls real loud as he's running. My daughter threw it in the pool and the ****er actually swam to the bottom, picked it up and swam to the steps and dragged it back out. Just thought I'd share.