The last two nights when we all head to bed the chickens go nuts! One in particular. When we come out to see what's the problem they are all standing bolt upright looking out in to the living room. Some are relaxed but I think the one is sending the others into distress. It's almost like its protecting from a predator in the area? Which there's no one there when it does this! And right at bedtime! Ahhhhh! Mind you, nothing has changed in the chicks environment, they are under a heat lamp so they haven't been thrown in the dark. Just the bustle of the family is gone.