I have six chickens and I live in Illinois, and in November it can have harsh weather. But as of a few weeks ago my wyandotte is losing feathers on her back, right by her tail feathers. I first assumed it was our aggressive australorp rooster mating her and scratching her, but then today o saw that the rooster has a large bloody, featherless spot on his neck...I'm worried about them losing feathers with this cold weather. Any explanations? Solutions? Suggestions? Anything would help! Thank you!