I got home a little late this evening with the chickens still in their detached run. I opened the door to escort them back to their coop, but they would not budge from that run! So I flipped the run on its side and pointed a flashlight at their coop. Thing I noticed was, the hens would hardly move when I shooed them with a foot / hand toward that coop. And normally they go tearing about the yard when they think I'm trying to pick them up, but I ened up just reaching out and grabbing them, then sticking them in the coop. What I'm wondering is: what causes the chickens to act this way? Are they sleepy and slow to wake up? Reluctant to move around in the darkness? Frozen in fear? They didn't really make agitated / frightened noises when I grabbed them, and they've never acted that way when frightened during the day.