Sad news, I lost a 3 year old Rhode Island Red yesterday due 2 Heat Stroke (first time ever), we'd had a 104 degree Fahrenheit day the day prior, she was perfectly fine, weighed about 6 pounds, ate well, normal poop, good egg production, however when i arrived at the ranch yesterday I knew something was wrong with her, she was panting, wings away from her body, she seemed a bit disoriented, picked at her food, comb and wattles a bright red color, no poop issue, i picked her up to take her into the airconditioned family room, and she died during that process, the day prior she was perfectly fine, it took her in less than 24 hours, today I'm doubling up on the frozen water bottles to put in their water bins....Hope this helps you, and brings awareness to you and others that are reading this post, this heat wave is something serious...no joke, it has the ability to be fatal. the rest of the chickens seem fine as of this morning.