I just got my new coop and the top ventilation opening (about 5" by 4') is not far up from the top roost bar, only 11" (the roost bar is about 10" away from that wall). If I had standard chickens, I feel the air would be at their heads. The pics showed that the top ventilation opening was a little under the roof, but my opening is about 19" down from the ceiling. Is this too low? Or maybe it's lower so that the heat at the ceiling doesn't leave in the winter, but then the summer heat won't leave either. The vent opening has a door that can open and close. On the opposite side of the coop there are 2 windows that open also. Ok...I finally was able to post this picture...what do you think about the top vent being too low? You can close it from the outside.