Ok..so as the winter gets closer...I am trying to figure out the best way to keep my girls warm in my coop. My coop (houses 2 girls at the moment) and is about 3.5Wdx3.5Lx4H.. I want to make sure my girls are warm enough, but I am very afraid of putting a lamp in the coop and causing a fire. I have been debating about hay bailing around the sides of it for insulation, but I would like some other views..thanks!!