My chickens are now 9 weeks old. I only have 4 and they spend most of their time in their run/coop. We noticed a couple of weeks ago that at dark they would automatically put themselves into the coop for the night and all we had to do was shut the door. Recently I had let them out into the yard in the evening. They love it and I am able to stay and watch, we have a very small suburban lot. I just assumed come dark they would walk into the run and go up into the coop. But they didn't! I had a wooden clothes drying rack on the porch where I had been sitting. The girls had come over sat on the chair and me and eventually got up on the drying rack and were clearly going to sleep! I had been very worried that if they didn't go back into the coop on their own I would be chasing chickens in the dark and they are near impossible to catch in the daylight. Thankfully they seemed very calm, guess they were just sleepy and I was able to take them into the coop one at a time. So what the heck, when will they know to go back into the coop on their own. Are they just too young to know it at this point?