My chickens are 22 - 27 weeks old. They have been outside in there coop / run since about 10 weeks. The run is enclosed so I just leave there coop door open at night. Never had any issues. They go to bed on there own when the sun goes down and come out when the sun comes up. The past 3 nights though I will go outside at midnight or 1am and will find 2 or 3 of them just walking around the run. At first I thought a cat or something was in there cause I could just barley make out movement but when I got my flashlight sure enough the chickens were just walking around like it is a normal day. What could be causing this? This is my first set of chickens and I am learning as I go. I would shut the coop to prevent this but as a mom of 4 the mornings in my house is CRAZY and I am so afraid that I would leave here one morning and forget to let them out. anyone have any clue why all of a sudden some of them are coming out at night?