You can get lifelytes at the feed stores. It is vitamins and electrolytes. Mix it up and put some ice in there for the hot days. You can give her some to see if that helps her get back to normal. Good luck andone of my hens had a heat stroke on a 121 degree day, after being in the shade plenty of water and spraying down the area surrounding to keep them cool, she is alive but not laying (sort of worried about that) and screams bloody murder if i even move to a place she cant see me. i think she might have brain damage but I'm hoping she just needs a little extra time to get normal-ed out.
