I have been referring to this site for a while, and just now became a member. I love your website! We are a family of 12, ten kiddos all ours and 21 chickens. A few years ago we moved to TN and tried our hand at chickens. It went fabulously with 33 chickens and we sold all our eggs every week. Our flocks were amazingly healthy and productive. After returning to MI, we started over with mostly RIR, a couple amber links, a couple black sex links, a couple Isa's and Leghorns for our own egg consumption. All was great. Clean birds with sweet temperaments! Just like in TN. But then a friend with backyard chickens in the city was told he'd have to get rid of his and so we took his in. As soon as they arrived I called a friend who has 70 chickens and she was happy for most of them. I kept three and their rooster, who seemed to be a gentleman. That was in October. Last week we started to notice one of his hens had a bare patch on her back, but was doing well. I figured the rooster was over using her and planned to separate her this weekend. We found her dead the next morning under the nesting boxes. No signs of any other issue. Now I notice some feathers off the neck of one of my own Isa's And today I saw my leghorn had a very wet head and feathers missing on her neck. I just separated the rooster today. It is one rooster to 20 hens. I noticed a few spots of blood in the house, and smears on one of the leghorns but no sign of injury on anyone. Egg production is still great. I go between thinking it's the rooster and wondering about mites. I've never had trouble with mites before. The man who brought me his flock said they had treated for mites at their place. I see no mites. But why is the one hen just fuzzy on the top of her head and neck? Can the rooster be pulling out feathers on their heads? I've never personally seen him mount them, but the man said the rooster has caused some to loose their back feathers before. Wish I was an expert! Wish I had never taken in the other chickens since mine were so great before. Any help would be appreciated!