I'm perplexed, The last two evenings, my flock of 5 hens and one rooster have been going in to roost and within the first ten minutes they start the most awful racket. It almost sounds like their egg song, but much louder and the entire flock is doing it. Last night it sent me in a panic running back out to the barn to see what beast had scared them so badly. Nothing. Tonight they started it before I even got the door closed for the night. Again - no critter, no monsters under the bed. When they start this ruckus, my poor baby goats panic and start freaking out too. Any ideas?