I'm in process of constructing a new coop for our 8 hens. Standard shed shaped, with a gabled roof. I know that ventilation is very important, but its also important to keep drafts out. I guess I'm confused on how to to have ventilation without drafts. I'm thinking that if I wire off the A-pitched part of the roof, on the face front and back, but make sure that roosts are lower the opening, that would prevent drafts? Thanks for any advice or input!!!