What a bunch of great ideas!! I'm new to owning chickens and right now is the hottest it's ever been in a long time here in VT. My girls are panting like crazy poor things. So I've been freezing plastic bottles and putting them in there run so they can lay against them and bringing out containers full of ice with water in it, every afternoon when I go home for lunch. Unfortuanlty I have one chicken that likes tipping them over and play in the mud.
Thanks everyone for the great suggestions I'm definitely going to use a few.

Thanks everyone for the great suggestions I'm definitely going to use a few.