Granted, I only had nine chickens to carry, one by one, into the new coop, but I was awfully glad when they decided to go in all by themselves on the third night. They were ticked off at not being able to go into their old coop, which I commandeered for the new batch o' adolescent pullets.
And one night, one chicken who routinely went to bed last missed her opportunity, when the automatic door closed before SHE made it in. She slept under the coop that night, and only that night. If she hadn't gone so far beneath it, I could have fetched her out.....
Patience. I didn't want to lock them in the new coop for a few days, first. I thought it was sorta cruel after they had been free to use the run for so many months. But if I had been forced to carry chickens for that third night, I would have gotten tough and locked them inside it for a few days. Once that automatic door closed, I had to carry chickens from where they had perched on top of the old coop, grumbling about it, out the run gate, close the gate behind me, walk down the path to the people door on the new coop, open the door, and place them inside. Repeat 8 more times. It wasn't just a simple "shove 'em through the pop door" process.