I have 6 chicks around 8 weeks old. I open the pop door before I go to work at about 5 o'clock, roughly an hour before daylight. I'm most certain that they do not come out before daylight. The problem is they won't go back up at dusk. I know that they can climb the ladder because they play on it throughout the day. Are the too young to know what to do? Is it because they feel safe enough in the run not to go back to the coop? Any help is appreciated.