Thanks everybody. I figured it was a "warning" noise of some sort. We live in a rural area with lots of nighttime predators but my dog and cats usually keep most things away. And during the day if a sky predator is around they won't leave the wooded area next to the coop but they don't always...
Occasionally when I go out to the coop the chickens are all standing completely still,staring off into the woods and making a strange growling,cooing noise. Not sure how to describe it. But I have seen them do this in places all around the yard. Is there something they feel is a predator to...