So sorry about losing one of your girls:( I live in The Dalles and it was very hot here also. My girls were panting and trying to stay cool- I let them out of the coop and sprayed down the grass with water and they seemed to enjoy that.
My DH is going to attach a mister for there run and see...
I have a four week old light branham that is blind in one eye-she seems to have trouble getting on the roost with my other girls- and a little more cautious about things.
Will she get more comfortable and adjust as she gets older?