I have done four different batches of chickens, and each time I put them in the coop in the evening, let them sleep in there. The next day I fed and watered them in the coop. That evening, I opened the door to a small temporary run for about the last two hours of daylight. I would have to put one or two back out of 35-45 birds. The second day I would open it in the morning, and the third day I removed the run. I have had a very good success rate doing it this way. Occasionally for about the first week, maybe one or two birds wouldn't go back in, but they also didn't wander far, usually laying down on the outside of the door or on the edge of the building.