I am just wondering since I live in the Northeast and fall is here it is now getting cooler at night. My question is when do you actually have to close up the coop at night??? Temperature wise that is???? Right now I have a couple of little windows in the front that I leave open and I leave their poop door open at night since their coop is enclosed with hardware wire (pretty secure). I know they need ventilation and all but soon the nights will be getting alot colder. Are they basically okay till it gets really cold??? I just got my girls in March so I havent had to go through any winters yet. If anyone can give me some insight on how their chickens managed through the winter that would be wonderful.