Put a light in your hen house to get the girls in at night. You can use an LED bulb for summertime without heating up the hen house. Replace the bulb with a red incandescent bulb (40-60 watts) in the winter time when it gets cold. This will heat the hen house nicely when it's below freezing without providing too much light and still let the girls sleep.
When I had chickens I had 2 funky birds (silver spitz) that would roost in the trees, could never get the two of them in the chicken coop, they roosted on top of the fence with the turkeys during the winter months.
Connie