Odd my girls are outside the moment its dawn.they stay outside all day and until its past dark which I think is really strange..vampire chickens! They are only in the coop to sleep, lay eggs or make sure there are no treats in there that may have been missed.summer or winter they are hardly in their coop at all. The bantam runs in to thaw under the heat lamp often through out the day. The scissor beaked bird is in there pretty often as she mainly eats feed and freze dried meal worms. Their coop hasn't been warmer than 36-37 f in some time..still about ten regrees warmer than it is outside. When it hits around the 40's we shut off the heat lamps. There are days with really bad winds..freezing rain and I wish the dumb girls would stay inside!
I don't use a heat lamp at all, the coop is warmed solely by their body heat, and I have straw substrate. Once the snow melted a bit, and was trampled down by the dogs, I managed to lure them out of the covered pen across the yard with some oats. There was a lot of flapping and squawking and running, but once they reached a dry spot, they were quit happy to dirt bath the rest of the day. Since then they've realized that walking in snow wont kill them, and they venture out every day. If it's snowing though, they dont even stick their head out of the coop.