I was wondering if anyone has any advice or insights for me. I have 5 and 6 week old chicks who are acting strangely at dark. I still have a heat lamp in their coop, which is on at night or during the day if it is cold. During the day everyone comes and goes through the door, into the pen, with no problems. At dusk, when everyone goes inside, a group of them have started to pile on top of each other in one corner. I am wondering if they may be chasing a shadow from the light, as they all seem to be looking up at the wall? So far no one has been injured, but I am nervous that someone will end up getting trampled. Last night 2 of the older birds were pinned beneath others for a short time, before they wiggled out. No one uses the roost pole at bedtime, (or an hour after dark when I have checked on them). One group is piled in the corner, where they eventually just lay down to sleep and the others are grouped around the edges of the light. They are evenly spread throughout the coop, and on the roost poles by morning. The light has a red bulb, and the chicks are a mix of hatchery stock - mostly EE, reds, white production, black sex-link, with some hamburgs, a barred rock, a Marens, 2 welsummers, and 2 bantams. I have no adult birds as I am just getting into chickens. I am planning on moving the light to the other side of the coop tomorrow, to see what happens. I moved it a couple of feet tonight, but it didn't make a difference.