I am in Arkansas and need help with Flies in my coop. I use pine wood chips on the floor of the coop, and I only have 4 hens and 2 roosters in a 8' x 8' coop that is 5' high. The attached run is 8' x 16'. The flies are so thick that I can hear them bussing from a distance. Should I put a Fan in the coop, or should I put DE on the floor of the coop. HELP !!!! Where can I find DE, is it sold in farm stores, or which stores sell it? And what about Python Dust, Where can I get this, in a farm strore, or where ???