Mine live outside all the time, they refuse to use a coop. They had a nice one but prefer to roost in the top of a huge tree, winter and summer. so I put more chickens in their old coop. Mine freerange anywhere they want and they never really leave the farm. I have around 40 adults now, and alot of keets in the brooders.
Mine also will absolutely not roost anywhere but in a tree. Even when it rained yesterday, they were in the tree. My two hens were going into the barn and roosting alot, but they don't even do that anymore.
I have had them for about 4- 5 weeks. They lady I bought them from didnt let them outside. She didnt even have a window in the building they were in so i dont think they quite know to go out. They chatter at me when I fill the feeders. I put them out in the run twice but they still havent figured out that they need to go out yet.