satomi, Noooooooo way in hell would i trust that set-up for the long term. One rat figures out how to chew it's way out, and all the others will follow and before you know it, you'll have an entire colony on the loose. I've learned from experience. And it wasn't for lack of stimulation. When I kept rats in tubs such as those they had blocks of wood to chew on, a couple of running wheels, and those little edible huts you could buy. If one gets curious and gets a tooth on the plastic and gets out, you're screwed

I ONLY trust mixing tubs, because there isn't anything they can get their teeth on. And yet I still have nightmares of waking up to hundreds of rats running around.

I know it's easy to get mixing tubs in Ontario, let me try to dig up some info in old FB messages.