I do not have chickens yet, but plan to start next spring and currently planning...I have a tracktor-coop on the drawing board but now I am stuck with the simple question of Winter/Cold - which will influence my design and what I build: I am in the northeast, so we do get cold Winters, lots of snow, but also hot/humid summers - at least for 2-3 weeks a year. I am more conecrned about the cold than the heat, so what should I consider ? I know I will pick cold hardy breeds, I will likely built a rather enclosed tracktor/coop with not too many openings and I could add a light as heat source for Winter, but is that really enough and what other options do I have ? We have snow on the ground for long period of times, so the girls will be confined to the coop plus minus the area below, plus minus part of the run I guess. WHat size sould I plan per Bird in that case ? Inside and out ? Can they do -20 F for a couple of days in a row ? Would that mean confined in the coop ? And how much space would they need inside in that case ? If someone from the northeast or Michigan or so could share some of their experience, that would be great ...I plan on having about 6 chicks...but I need a reasonably sized coop as well... Thanks !