I have 2 hens out of the four that I acquired as day-Olds in the Spring that will not go up into the coop and onto the roost at night. Instead they will sleep on a very narrow basement window sill that is enclosed inside their run. I introduced the 4 pullets to my established flock of 3 older hens over time and had the expected picking on and pecking order behavior. I thought the avoidance of the coop was a response to this behavior and over time would work itself out like it has with the other 2 pullets who seem to have no problem going to roost at night. I have covered the window sill so they can't roost there and put a light on in the coop to try to attract them in from the run. They just sleep in the dirt. One of those pullets even lays her eggs in the run. (The other will go in the coop to lay but then leaves and doesn't go in again till the next day). I have even taken them from the run and put them on the coop roost after dark to 'get them used to it' to no avail. Any ideas?