Why don't you tempt your chickens with a treat late in the evening just before it gets dark. Bird seed or peanuts or whatever you can give them that they go nuts over. Call them and put the treat in the house about the same time they need to go to bed. I call my chickens when I want them to gather up. I yell "Cheeekens" and they come running for a treat. This only applies to my older breeding stock. The offspring haven't been trained yet.