This question is about ventilation, drafts, humidity, and the birds being warm in the winter. This is my hen-house: There are 4 lower open windows and 4 high round windows. Certainly there is great ventilation, but the position of the open lower windows on 3 of 4 walls makes for complete cross drafts. (the 2 front windows were converted into closed openings to the nest boxes: I use the deep litter method and the girls sleep on the floor in a chick pile partially buried in the straw/hay.(as the house is pretty elevated, they have never roosted when they sleep inside the hen-house--funny). I'm not sure what I should do. I was planning on making some kind of plug covers for all the windows, but now know that is a bad idea. If I cover any, I will just staple plastic up over the window to keep the wind out.