I have 6- 16 week okd hens. I allow them to free range in the late afternoon/evening when I am home. The last two nights, one of my hens has not returned to the coop, but instead finds a place to roost, right outside of the run. I have picked her up and put her in both nights. Prior, she was always the last in, but went in at dark on her own. Thoughts? There seems to be plenty of roosting room in the coop, but all the ladies huddle in one spot.