We have a 12'x10' run with a 3'x5' coop/nesting area inside. The girls have always simply learned to climb the ramp up to the coop/nesting area when introduced to the flock. Once that happened, they slept up there with the older girls and laid their eggs. We now have four pullets that decided to sleep in the rafters of the run instead of climbing up to sleep in the coop. We've put them into the coop at night a few times, but they always go back to sleeping in the rafters. My concern is that once they start laying they won't be doing it in the nest area, but in the general run area instead. Any ideas about how to proceed?