Egg production has been slowing down and after reading on this forum I figured it must be due to decreased daylight. I was going to put a white light out in the coop for a few hours but I already had Christmas lights up inside so I put them on. I forgot to turn them off before going to bed. I got up at 4am for work and I hear a racket coming from my chickens. I started to panic thinking a predator was in the coop so I ran outside. I get half way to the coop and I realize it's not a sound of distress coming from the coop, but ALL of the chickens sounded like they were singing! I swear it was like listening to an organized choir singing. I was not drunk, and not sleepwalking or dreaming (as my husband suggested when I tried to describe it to him) lol... I unplugged the lights and they all instantly stopped and it was dead silent. Last night I purposely left the lights on and when I got up at 4am I heard the same thing again. WHAT is going on??? I left them on again tonight and if they are singing again when I get up in the AM I'm going to try to video it. I swear, I'm not crazy!