I have a mouse problem in my chicken house. I noticed my chickens have broken and missing feathers on their backs, but I thought it was because of an over aggressive roo. He usually ends up with feathers in his beak after doing "his thing".... Could it really be the mice crawling up on my hen's backs and eating their feathers at night? All, except for my roo, my black coachin, and my little bantie are missing feathers. One hen is so bad, her elbows are exposed. Time to declare war on the mice!