I lost one full grown chicken this week to the heat and some of my newly hatched chicks. They just couldn't stay cool enough with it being almost 100 out. They had water at all times and food but even with Mama to help them and tell them what to do they still got to hot and died. The hen I lost was 1 year 2 months and died in the coop in one of the nesting boxes. She had no problems before that day but boy it was hot out yesterday. I have given each coop triple waterers and I am changing them three times a day so that the water is cold. Scared to go back to work on Monday.