My chickens have always been penned. Good size area. Live in upstate NY Recently I was gifted 3 adult layers that were free range and they refuse to enter the coop and stay on a perch most of the day, Just before sunset they go down to eat. They have come down to lay eggs in dirt and then go back up. Been a week now and no change. Came home this evening and there they are perched in the pouring rain.... suggestions ??