For any of you that use sand, you can cool down your chickens really easily by wetting down the sand. (and this works so much better if the run is covered so the sand stays in the shade). You know how beach sand is really cool down deep? Well when you wet your sand down, it does the same thing. I wet mine down and wait about 30 mins and then turn it all over and wet it again. In about one or two hours, the entire floor is really cool. Super cool. Even though the air temp might be 100 degrees, the sand is extremely cool to their feet. It seems to keep my girls so cool in fact they will stop panting completely on the hottest of days. Their feet will actually feel chilly standing in the cool sand. This with a fan running in the coop as well and they stay really cool on those hot days. Oh and of course lots of cool fruit to go along with this cool sand.