I, like you, have an insane chewer (and he lives in a 3,000 sq in cage!). I find that tons of exercise goes a long way. Letting them out for an hour+ has made a huge difference in behavior for my ham. Something else I've recently implemented is scatter feeding. This keeps chewers occupied and allows them to practice natural foraging behavior. It's worth a shot if your little one is keeping you on your toes. You can try blocking the hole off with something like cardboard (or I've found more efficient) ceramic tiles. A bendy bridge lying against the hole can also help quite a bit. If you share pics of your setup, we may be able to suggest adding things in certain places to aid in stimulation. Good luck with your little one
