My coop is an 8x8 previous goat house with no windows. I put in vents (but need more)and would like to have a larger window type opening with hardwire covering (covering part of it in bad weather with plywood flap or something). What side should I put it on? The East and South sides are enclosed in the run, so I am thinking they would be the safer bet as far as predators trying to break in. Do I need to have 2 window areas open on opposite sides of each other for better airflow? how big should these openings be? Right now, I only have 5 small type of vents up high on different walls and a large pop door,but that is not enough ventilation as I am getting an ammonia smell this winter because the gals don't want to spend anytime outdoors. I do open the large people door during the day for ventilation. Any thoughts would be appreciated.