So I am about half the way done with building my coop and I had a question. What do you guys do for venting your coop and getting good air circulation? Do you leave the coop "vented" all year or just durring the warmer months? I was thinking about leaving about a 1 and 1/2 inch gap at the top of my coop where the walls meet the roof to let air flow through. I figured with them being up high it will help the coop from getting to drafty. Not sure if I need to cover them durring the winter months though. What do you guys think?