This is my coop that my husband built about 10 8 years ago. It's been chicken free about 5-6 years. Need to get it fixed up quickly as I suddenly have the itch for chickens again (my little ones are old enough now to enjoy them and allow me a little time for chickens again) So the inside used to have styrofoam insulation and plywood interior walls. We ripped that out as it was a haven for mice. The mice drove us to give up chickens in the first place. Do I need to do something as far as adding interior walls? I mean, will the cracks make the coop too cold in the winter? (We are in Tennessee) I was thinking we could add something between the studs, right up against the exterior boards, leaving no gap for mice. Is this neccessary? Desireable? Maybe it's just good ventilations? What I'm planning: roosts nest boxes replace chicken wire with hardware cloth paint interior put some sort of solid floor in interior The interior is 4x8, pen is 8x10 Any other/better ideas are very much appreciated!!!