my ameraucana hen quit laying a couple of weeks ago, actually several weeks ago. all seems to be just fine. she is about 10 or 11 months old. i'm feeding laying mash. i have a light in the coop so there is plenty of light. is it maybe because i have a couple too many roosters?? i have the rooster that i got with her, and a couple more that i accidentally introduced to them. however, they do not seem to be at all aggressive. her rooster rules the coop. they have plenty of water, changed out daily, along with their food. they are all let out of the coop first thing in the morning, and locked in after dusk. any suggestions would be greatly appreciated. they all seem to be perfectly healthy. and all seem to get along fine. so i don't understand why she stopped laying. molting is not an option....no feather loss.