I live in Tennessee and it usually does not get THAT cold here, but we are about to have a couple really cold days. (For us) as low as 4°. I've been reading a lot about whether to heat or not and to make sure the coop has good ventilation and is draft free...etc. We just have a cheapo coop/run from tractor supply (I will try to add pictures of the coop) that we've covered with painters drop cloth plastic sheeting and a tarp. We stapled the plastic wrap to the outside of the run, but not the end with the door. That is still open with chicken wire. And then covered the coop with the tarp to help reduce drafts. The floor of the coop is just a wire bottom raised above the ground so there is probably a draft coming from there too? We have a heated dog bowl in it so their water doesn't freeze. I'm not sure how to tell if the coop is ventilated well without being drafty. I'm afraid there might be moisture in there because my barred rock has a little bit of frostbite on her waddle. I thought this was weird since it doesn't get that cold here, but I read that could happen at night if there is moisture in the coop? Should I use any heat with this set up? These temps are not common for our area and was wondering if that means my birds are not acclimated to them. Does anyone have any suggestions for this coop/run setup to make it dry and draft free? Sorry so many questions. I'm overwhelmed by everything I've read about it. These are the pics of the coop from the tractor supply website.