I can verify that the lockup works. I let me chick have the run of the run and the yard when I'm around to supervise as soon as I put them outside. I could not get the me to go into the coop at night without chasing them down and putting them in the coop and shutting the door really fast. I locked them up for 5 days and after about 2 days they hated it. When I let them outside again, the first night when I went to put them to bed, they were already inside on their roosts.
All was good until yesterday. It started to rain, not hard, but my daughter thought they should go in their coop. She went out and chased them all down, collecting them in her arms and put them in the coop. I did not know any of this. I went out later in the afternoon and they were all huddled in the nesting box and would not come anywhere near me and did not come out the rest of the day.
Today, I opened up the coop and they have not come outside at all. I had their food and water outside and thought they would eventually come out. Nope. I was able to get them to come to me with treats but not to come outside. Around noon I finally put the outside and they all just ran back in and are still there now. I guess I just wait and hopefully they will come back outside again. My daughter must have really traumatized them. She like the chicks and is very kind to them. I'm not sure what freaked them out so badly but they sure are freaked out. Poor things.