Unfortunately, where I live is the humid, steamy south. i run a fan in the coop on medium this time of year. We free feed 22% super layer pellets, frozen watermelon, fresh veggie trim and triple the water supply with frozen water bottles dropped in. If you climate is the dry heat i would use a hose end mister, or I have a 15 head mister I got for 19.99 a few years ago. Set on a timer if you want it just on during the hottest parts of the day and you will be away-- putting a fan just behind the mister will really bring the temp down. their body heat is 100*, so if you don't lower your temp you will lose some. Here a few people run the sprinkles on top of the coop roof to lower the temp.