So my DH and I are getting a new coop for our girls. I would like it to be insulated, but he leans towards no insulation, as he has read that it can increase the humidity to much in the winter. This winter we had an uninsulated, unheated tractor style and the girls did fine. Everyone survived. But, if we are going to the expense of building bigger with lots of my "wish list" items (like head room, a person door, space to keep extra food/ shavings/bird care-medicine items, linoleum floor, windows etc.), it seems like having insulation would make sense. We live in Maine and it is pretty damp/cold where we are in the Winter (and a fair amount of fog in other months of the year). I know the little fuzzy butts have those nice warm down vests under their outer feathers, but. . . what do you do??