I recently discovered an unusal amt of feathers on thr ground of my coop. Its been consistent for about a week now. Today i noticed my two black australorps have feather loss around their necks. I cant see mites but coukd they possibly have mites in the middle of winter when it hasnt been above freezing in weeks. Also due to thr cold and ice in the great northeast the chicjens have been spending more time in their coop so could it be ithers pecking at them out of boredom. I also have one rooster with the 6 girls,,,could he be to blame,? Im still new to chickens so this is new to me. Any advice is appreciated. i attached a photo of my onr girl with feather loss.