We are in process of building our "chicken coop" and are debating on how much ventilation we need. The chickens will be in a lean-to that is 14' long, 6' wide, and goes from 5.5' to 7' high. There are 2 windows that I can open on the long outer wall. The lean-to is attached to a shed that is 14' long, 10' wide, and 7' walls with a 3' gambrel roof. There are 2 windows on the opposite side of the shed from the lean-to. A door will be on the connecting wall to let me get in and out of the lean-to from the shed. We were considering putting vents up high on the connecting wall so that we can open windows on both ends of the building and have air flow that way, since I prefer to leave the connecting door shut (and keep the shed floor as poop-free as possible). Does anyone think it necessary to put any vents on the lean-to outer walls at all, or one of those circulating vents on the roof (the ones that the wind spins and it draws the air up and out - sorry don't know the name but the hubby is fixated on those - I don't think it would look right on the lean-to)? We live in Michigan, so it can get pretty warm in the summer, but pretty cold in the winter. I have 6 chickens at this point - don't plan to increase that number too much in the future but reading on this website I think a lot of people say that and things change Any ideas/suggestions/pictures would be great!