This is my 3rd batch of hens and about a month ago I was awoken by a crowing like sound. I looked in the coop and one of the hens (no dew claw or ornamental feathers) was crowing. She hit the road. Now I have 3 chickens left and 2 are crowing. I have tried to black-out the roost section and close them in at night so now they are crowing later in the AM. How can I get this to stop? Help!