I hate it when he is right!!! I did/or actually he had turned on the mister right before I got home (although I know he didn't want to) and you are right, they ran away from it but as soon as I turned it off they went straight for the wet dirt. My other chicks (3 little ones, younger than the ones in the coop) are doing pretty well even in the garage, although I wanted him to take them out and put them in the shade. They aren't even panting. I have been putting ice in their water.
So this Momma Hen isn't so worried about them worried about them now.