i just wanted to add to the what works in this weather discussion. i have a large dog kennel with a tarp roof, misters and box fan set up along the west side, and backed up to the block fence on the east. their roosts are on the north near the nest boxes. there is no "enclosed" coop, just tarp pulled down making the NE corner of the kennel closed off to the elements.
they get layer crumble and fresh water every morning and i feed them cold or frozen fruit and veggie scraps 2 or 3 times a day. there is one kitty litter size pan full of water that gets refilled every day for them to stand in and drink from. today is the first day i put some ice in it.
we have had no heat loss and very minimal panting. it works for them, so it works for me. i'll let everyone know if this tarp survives the monsoon