There are a number of videos on YouTube on keeping chickens cool when it is really hot. In one, a home grower in Phoenix (117 degrees) took a wide, shallow, round plastic container (apparently found in hardware stores) and placed bricks that came just above the water level and his girls stood on them repeatedly (alternating to get food, water) and they weren't even panting. In fact, they looked like they loved it. If it gets over 104 here and my girls are panting, I'm going to try that!