I have a nice size coop for my 11 hens but I don't know how to keep it cool! I have 2 story coop, coop on top and run on the bottom. I have the typical ladder going from the top to the bottom and that hole is open so the hens can go up and down as they want and I have 2 air vents about a foot wide on each side, and 5 inches tall or so, on opposite sides for flow. I also keep the coop doors open in the day to help with air flow but in the evening, when the girls go to bed they go from a shaded yard to a hot and stuffy coop. Of course heat rises, so it's really hot in the top....And the only place we could put the coop is not shaded by our big tree. It has just started getting hot here in UT so I haven't had to worry about heat yet and it's our first year. They gull and hold their wings out and they don't do that at all during the day. I just put 2 frozen water bottles in there tonight and my husband is at the store right now getting a few more air vent covers so we can put more in but what else can I do without putting in electricity? We had a house down the street burn down last year from a chicken coop disaster and we are afraid of putting in any wires, or electrical fans.... Any advice would be great! Thanks!!!