I have three 10-week old chicks/chickens. They have been in their chicken tractor for nearly 2 weeks. About 7pm I lock them in the run part of the tractor and come back once it is dark to check on them. EVERY night they are huddled in the corner trying to stay warm and have not figured out they need to go back to their home. So every night I physically pick them up and put them in their house. Fortunately the corner they gather in is near the door and I don't have to crawl in the run to get them. I know at least one of them has figured out they can get into the house on their own because I checked on them one day (mid-day) and one of the girls was sitting in the house. Does anyone else have experience with chickens that are slow to figure out where their night time home is? Should I build a ramp?