Hey there! Our home came with an existing coop that we are making some changes to before our chickens arrive at the end of this month. One of the big things I am worried about is not having proper ventilation. Currently, the coop has ventilation through the pop door (which will be closed at night because the run is currently covered with chicken wire and not hardware cloth), and through open rafters (5 on north & south walls, each measuring about 14.5" x 3.5". The coop has two windows on each side of the south-side human door, but they are inoperable, for light only. The roosts are on the west side, and the nesting boxes are on the east. From what I've read about drafts, I'm VERY confused on where to construct another window for ventilation. The only place that seems draft-free would be on the north wall where the pop-door is, but then the only cross-ventilation would be from that window to the rafters on the top of the south-side. Any advice is appreciated!