this is our first winter wth our 10 hens and rooster (easter eggers and buff orps). And today is our first snow!! Here in good ol' Michigan. We have planned for winter , but there are so many things I have read that say one thing and then other articles or opinions that say another.. Our coops is a large shed 12x16) converted. It's insulated, has two home Style windows that can be opend or closed tightly. We had two vents at the top where the roof meets the walls And two other passive vents in the roof but my husband thought they needed closed in the winter. The coop door (12x16 in) is left open all day to their enclosed run. We have two heating lamps going all the time also. The temp near the lamps (but not under them) is keeping above freezing. (For now) My concerns are the ventilation, which I know is important in the winter. If I open the ones at the top won't the heat escape?? Making it below freezing? Should I crack the windows instead? Or is that too drafty? Of course I'm concerned about a fire.. Two heat lamps running all the time.. Scary!! But how else do u keep above freezing temps? I don't want sick or cold chickens, and I don't want a fire or frostbite.. What's the best plan for us? Thanks in advance!