I have 7 six week old chicks, they are Buff Orpingtons, and 2 are Easter Eggers. I was wondering if I can put them outside, it gets in the 40-50s at night, sometimes high 30s. Would that be too cold if I can't put a heat lamp in? They really hate being in their brooder, they try to get out, and succeed. Could I put them in upside down plastic totes, with doors on them? Would I need a 'floor', roosts? I would put something heavy on top of the totes, and they would be in a fence, and I could put stuff around them... Please answer soon!!