Brand new to this. I have 3 beautiful hens 12-14 weeks old. They will not go in and out of their coop. I have to physically put them in at night and in the mornings they won't come down. When I open the door they just come over and look up at me. Is there anything I can do to train them. They refuse to use the walkway/ladder I've built. I close them in at night for safety and security.