I have a flock of 15 birds--13 weeks old. They have been living in their run for 8 weeks. I really want to start having them free range sometimes but am so afraid that they will not make it back to the pen. How do I go about letting them have some time outside. I was thinking that I would let them out after noon today, and at about 3 try calling them in with some scratch. But if they don't come in, I am gone from 6-9 and it will be dark. Perhaps I should wait until there is a day when I can watch them till they all go in at night. Help!