I have a flock consisting of light brahmas, barred rocks, and a golden-laced wyandotte, all of varying ages. The girls all get along quite well. However, my oldest light brahma is VERY loud! She began the behavior about 5 weeks ago - two weeks before she began laying - and at first I thought she was just trying to figure out how to lay. She is now a fairly consistent layer, but she is still so darn loud! She starts first thing in the morning, and then periodically throughout the day. None of my other chickens - laying or not - are doing this. What is going on?