So the other day I let my month old chickens out to free range out of their enclosure for the first time. It was about 6pm so I knew the wouldn't wander far. Well they were enjoying the outside time and I had my phone ring (Just got a new ringtone with a rooster crowing and clucking) Well they all perked up and walked quickly back into the coop. I am guessing the clucking made them think of danger. So next time I want them to go in early I am gonna play my ringtone again.