Some very interesting stuff in this thread. I hope no one minds my putting my 2 cents in.
I have a pullet who was living in a friend's yard for 2 weeks (we guessed her to be about 8 weeks old). I took her home (long story), got her a coop and let her free range all day. At night, she would roost in a tree unless I lured her into the coop. That's been working okay for us although she won't go into the coop on her own except for a quick snack during the day.
In the morning, she paces in the coop until I come let her out. She seems quite agitated. Lately, she's been better (it's been about a month and a half now) but still balks at going into the coop at night.
I attributed her behavior to her being "wild" for the first few weeks of her life. I'm hoping that when my chicks are old enough to go into the coop she'll want to be in there with the "gang". I'm REALLY hoping she doesn't teach them the joys of tree sleeping!
She's a black sex link, approximately 14 weeks old. Today she seemed quite agitated I guess because I moved the nesting box back into the coop from where it had been. From the number of feathers in it, I guess she's been spending a lot of time in it. I'm hoping its presence in the coop will make her more at home there.
We're working on increasing the size of the run and the coop.
Just remember, no good deed goes unpunished! I rescued a chicken and now she runs the house. Don't tell the dog!