I'm really scared now, my gliders do all types of crazy things on their wodent wheel, and i just figured it was fine. One will be at the to the other one will start running in the wheel while the one on the top hangs on for dear life, they do flips in the wheel hang upside down hang outside the wheel and let each other take turns spinning....the wheel is their fav. thing..in fact i have a big wheel and a small wheel so they each can have their own when they want to....is that safe or shoould i take the wheel out...I cant bear to imagine them getting hurt or dying!!! So sorry for ur loss....at least they were loved, and got to experience a good home before they passed...