So... we are in Portland, OR and it was 99 degrees today. Two of our three chickens just started laying this week. One had laid three eggs and another 1. We left our house about 4:30 and put two frozen 16oz water bottles in the run under the coop. They also had fresh water. I also spread a white sheet over 1/2 the run to provide some shade and still have air circulation. We arrived home about 10 pm to find one of the laying hens dead in the nest box. Could she have died from heat stroke or do chickens die from being egg bound? We also just changed their hay today. My husband says there was some mold growing on the hay. Could that have done it? Also, any other suggestions to reduce heat?