I had a lone chick hatch last year. We put a stuffed animal in with him and he pretty much ignored it. But we also put a little mirror in there with him and he loved it. He would get as close to his image as he could and go to sleep. I know he thought it was another chick. And btw, he adjusted very well when I put him in the main coop with the other chickens. And of course, he was a roo.