You should have seen the pileup the other day when the chickens realized the world was white! They eventually wandered out when the snow started to melt a little bit. So, today, with new snow, they are all hanging out in the henhouse.
I feel bad for the low one/two in the pecking order.
I know the door is open and they could 'escape,' but they don't. There are roosts too. But they do have to eat sometime. I feel bad for them.