I just brought home ten 8-week-old hens. They love my chicken coop, and are now enjoying the days in their run, but they don't seem to want to jump up into the second floor of the coop where the roost and nesting boxes are. Instead, they all hunker down on the floor of the coop together and sleep in a huddle. Will they eventually find the roost and nesting boxes, or do I need to do something else? They have a stump they can jump onto, and then it's another hop up into the roosting area.