I have a coop cam and last night found my silver laced wyandotte named Karen laying on the floor. We ran out to rescue her but it was too late and she literally died right before we got to her; (yes, my crazy ass tried cpr). It was around 90 degrees here in PA. For reference it has been this hot many nights. She was one year old, a good layer and a healthy weight. She is the head of the flock and kept all the ladies in line. Needless to say we are very sad. Our chickens are our pets. There were absolutely no signs of illness. I thought if the heat would take any of my chickens it would have been one of my giants. I have an expensive coop with adequate ventilation. We put frozen jugs of water in the coop at night. After finding her, we added a fan in one of the windows. I can't get a necropsy done where I am, but if it was the heat, I would like to know how to avoid it happening again and any suggestions or opinions are welcome.