Two days ago after letting my 2 year old hens out of their coop, I heard crowing coming from my yard. I have no roosters, and this has never happened before that I know of, so it took a few times hearing it before I was sure that it was in fact coming from my hens. I went outside to see what the heck was going on, and saw my Boss Lady hen stretch her neck, flap her wings, and cock-a-doodle-doo. A minute or two later, she went back to clucking and chattering in her normal grumpy-hen way. What gives? Is this because she's the dominant hen? Pretty sure there are a few backyard roosters within a few blocks of my house, does that matter?