Oh my! He's chewing on a tooth was your worst case scenario? He must be pretty good about not chewing on things that he should not be chewing on because his tooth wouldn't be my worst case scenario. The first month that Gizmo was allowed to sleep outside the crate, he chewed through one of the cords on one of my mom's antique lamps and was electrocuted. Thank God he survived.
Glad it was only a cheeze-it, by the way.