Free range them in the evening? That is what we do, one pen a night (so the roosters don't go after on another!) When the sun goes down the chickens put themselves to bed, we close the coop door and all is well. We try to given them all treats in the evening. Either garden or kitchen scraps, bread, really few things are off limit. So when they are free ranging they keep an eye on their people who they know will give them things. They stick close by! We also give them yard clippings and save some to through in during the week as well. Some places sell chicken toys!