Tonight my two 12 week old pullets are spending the night in the coop with the three 21 week old pullets and one roo. They have been seeing each other during the day for a couple of weeks now but because of my set up I've had to return the little ones to their quarantine pen at night. During the day they have mostly observed each other through fence, have free ranged together a little but mostly ignore each other. Any direct interaction has involved chasing and pecking by the big ones and a lot of noise from the little ones! This evening the little ones decided to go in the big ones' pen and while they were in there the big ones came home. I closed the door and watched closely. Aside from a little pecking they did fine. When the big ones went to bed the little ones went in and came back out of the coop. I waited until the big ones were settled in and stuck the little ones back in the coop. They wouldn't sleep on the roost but everyone seemed fine. I set up a box in one corner that they can hide in if they get attcked but I'm really worried about what might happen in the wee hours of the morning! Do I need to go out there at the break of dawn and check on them? When do chickens wake up? What do you experienced chicken mixers think? I'm not going to get much sleep tonight!