Hey All! So I have about a 4x4 coop inside of a 7x7 run. The coop is off the ground and the chicks have constant access to the run (the run is secure). The coop and run is covered. I will put plastic sheeting on most sides of the run. All the way to the top in the areas with prevailing winds and about 1/2 way on the sides that face away from prevailing winds. I don't think I need to do this, but I'm gonna double check. Do I need to add something as insulation to the inside of the coop? We are in UT. We can have really cold spells for long periods of time. We get freezing temperatures and snow (but not always). I plan on leaving the coop door open year round for air intake and the top of the coop is all ventilation between the top of the coop and the roof of the coop (I could cover some of the open area if necessary). I was thinking of using corrugated cardboard as the insulator if it is necessary - has anyone heard of using that? Thanks in advance.