My chickens, since I moved them in the coop, have been piling on top of each other in a corner at night. Here is the thing, they know how to roost at night. Anyone who doesn't fit in the corner (typically 1 or 2 chickens are rejected due to limited space in the corner) roosts on the roost for the night. So they know how to sleep on the roost, they just prefer the corner. I don't know why. It's not that cold. What should I do?