I know the roost bar needs to be above the egg box, however does it need to clear the top of the egg box? Going to put a window covered in hardware cloth below the vents but don’t want it to be at a level to be too breezy with the roosting chickens...suggestions on how far up to put the roost bar and windows (and how big should windows be)? Both sides will mirror each other...total of two windows and two vents. Extra info...We are also installing a ridge vent. We’ll probably put cutouts on the doors on the opposite end of the egg box with hardware cloth for more ventilation, we’ll also have a pop door. We live in Missouri...extreme weather both hot and cold. Four hens. Thanks!