I have a nice size coop 12 by 16 feet with 9 hens, two roosters and 2 peacocks almost a year old. I have noticed my larger rooster really vigorously causing my hens to loose all the feathers off their backs and wing areas. One of my hens was dead in the coop today and she had not been sick yesterday, just a loss of the feathers. Has anyone had this happen? What is it? What should I do? Please help me for I love all my beautiful Americana girls & my Buff Orpington hen. My roosters are an Americana & a Bantam cochin.