Our eleven babies are 6 1/2 weeks old, and have been playing in their run all day for two weeks. We have been bringing them in every night, but think they are big enough to stay out all night. They don't have a coop that locks up, but a "predator proof" run with electric fence, buried hardware cloth, etc, etc. Just before dark, we go fetch them, and they are huddled on top of each other by the gate. Are they waiting for us? Or are they terrified of the dark? Dare we just leave them alone, and see what happens? I'd hate to wake up next morning to see paralyzed with fright chickens! Advice, please.