My hens are one year old and in excellent health. Very recently they have cackled very very loudly around dawn, 5:30 AM. There is no predator and no egg laying going on at that hour. They seem to just want out of the coop. As soon as I open the door they tear out and begin looking for insects etc. I live in a neighborhood and if this behavior continues through the summer I may have to abandon keeping chickens. There was no such noise in the previous seasons. I did not get a rooster just to avoid being a noisy neighbor. These five hens are loud enough to be heard in the next town. Any ideas?