I have built my first coop, and I thought it was great...however, the chickens wont go inside. They prefer to sleep on the roof. Its 4' by 6' and about 4 feet high at the roof peak. It has perches along the back and up in the rafters. The floor is 3 feet off the ground, so they have a ramp to get in and out. I have 9 black sex-link total, 6 hens and 3 roos. They went outside at 7 weeks old and are now 12 weeks old. When they first went outside, I would round them up and put them in it at night. But, they would all crowd around the tiny pop out door, and wouldnt even explore the inside. They still only will go inside occasionally, and only for a few minutes. It has a vent in the back and the front has a big screen area above the door. During the day, they have the run of the backyard, and go into their pen at night, but will only roost on the roof. Its okay with me if they sleep there, but I am afraid they will freeze in the winter. Does anyone have any suggestions that might make it more appealing to them? I figured they would just go right in, but I guess not.