I usually grab a couple of my chickens off the roost just before beddy bye & look them over I check her vent for bugs etc. I always feel her crop & comment to her that hey girl you should sleep good tonight because your crop is full. Take a light inside the coop at 2 in the morning & shine it on them it really sounds like bombs going off they all start pooping .

If I'm ever up at that time I might actually do that! HAHAHA