I have 18 six week old chickens. A combination of Reds, Pylmouth Rocks, and Cornish Rocks. I got up this morning to a Red that wasn't moving. Just laying there kind of trapped between her feeder and the wall. I put them outside and got a special box ready for the sick chicken. When I went out to get her, she was dead. No sign of trauma or anything and all was well the night before! Tonight, when of the Cornish Rocks is panting with her mouth wide open. Everyone else seems fine. The chick that died wasn't panting but she did seem to be breathing heavy. I have never had chickens before and just don't know what to do. Please help!