Need some ideas here. I realize the need for dry conditions in the chicken coop. My problem is I live in ND and it gets very cold here in the winter. Cold as in -30 below zero Fahrenheit. My coop is insulated and very tight. I need it this way to retain some heat in the coop. As a result it is very humid in there. If I add venilation, I won't be able to keep the coop warm enough and will have frostbitten birds. Luckily it warmed up to 40 today and I opened the windows and changed the floor litter to dry it down a little. I am trying to plan for next winter. Any ideas?