I have 12 chickens, 6 EEs and 6 cochins. EEs are 9 weeks and cochins are 13 weeks. All of the cochins came from my mothers flock. 2 of them i received when they were 4 weeks but the other 4 I just recently acquired. I've noticed the new 4 huddled together in the run at night instead of going in to roost. I don't have a heat lamp in my coop because I know they don't need it but my mother however does have a heat lamp in hers and turns it on every semi cold night. I decided to put a heat lamp out there to see what would happen and sure enough as soon as I turn it on the 4 go inside. I should add that I have a security light on top of my hill, it doesn't shine into my run but it does shadow it just enough so I can see if anything is heading towards my chickens. Are they trying to sleep in the run because of the little glimmer of light and they think its the heat lamp they're so used to or are they use to the heat so they wont go in without it? I do know that they all have adequate space in the coop and that its not my other chickens because I think these 4 have already made themselves pretty high in the pecking order just by behavior. How do I get these chickens inside without a lamp?