For the past week my older hens won't go back to the coop. When I have brought them in there and closed the coop door, but they just slept in the ground and wouldn't sleep in the hen house. They are still laying their eggs there during the day and comint in to eat and drink... but they are sleeping in my flower boxes. I feel bad and don't want anthing to get them. I opened the window in the hen house... I cleaned everything out. I just don't understand.