It is like 3 degrees F now as night falls, and will go lower tonight with windchill in the -15 to -20 range. I put on the red light I used when they were chicks. It is a heat lamp. I go in to shut the door to the run and give them some scratch and they‘re all king-fu fighting. Hens with hens, the two roosters fighting each other… What is going on on? Never seen any fighting before. this. Could it be the light? I have turned it off for now.