My flock is about two months give or take. They are outside in the big girl coop and have been for a few weeks now. They have a roost that I have seen them on during the day, hoping on hanging out for a short time then hoping down. But.... every night I go out to make sure they are in the coop,as I leave the door open to the run, and without fail they are huddled up on the floor somewhere. I had a 250 watt light out there up until yesterday when my cozy coop heater arrived. To entice them to the roost I put the cozy coop heater next to it. I just went out to check like usual, huddled on the floor. Away from the heater. What gives?