I have an east facing window that I leave open all the time, no matter what the weather or temp. Of all places to roost, this is the favorite. I will qualify by saying it is under a large overhang, plus the shade covering over the runThank you! I am planning on leaving part of the soffits open (with hardware cloth) for ventilation. Windows are ok to blow a breeze on the chickens, when opened in the summer, right? Because I have windows on the north and south walls and the areas on the top of the east and west walls that I was planning to always leave opened for adequate ventilation in year round.