Have a small coop for now.... wife came home with 2 hens from a friend. Then built a 6x12 run around it with some dog kennel panels I had and put a roof on the run that is clear corrugated PVC cuz it rains sometimes in western Oregon. As the rain started I covered the half of the run where the coop is with a handy blue tarp. With more serious rain now...mixed with a good stiff wind and the water running off the roof... I just put up another of those handy blue tarps on the other 6 feet of the side toward the wind to keep the mud down. Wife came home from work and told me one of the gals who lives on her parents farm said I need to take it down due to blocking air flow and light. FACT or FICTION??