This is Chanterelle, our friendliest Buff Orpington hen. She is missing feathers on her back and on the tops of her wings. The ones on the back are completely gone; on the top of her wings some are missing completely and others appear to be broken off and the shaft stumps have a sort of a jagged edge. She grew a bit of down to cover a small part of the bald patch on her back but as you can see most of it is still bare, with no sign of pin feathers. Also, Chanterelle's tail feathers look very thin, particularly close to the base. This started as feather loss due to over-mating this past summer but our rooster in not mating with Chanterelle much these days, I'd say maybe once a day at the most. What do you all think is going on? Could Chanterelle have feather mites or lice? So far I haven't been able to spot any on her but I will bring her inside tonight and will look again with a flashlight and a magnifying glass. She is not showing any signs of molting although most of our chickens (13 out of 15, with the exception of Chanterelle and one other hen) have already gone through a molt or are molting currently. None of our other chickens have the same feather problems that she does. Our one other hen that had a bare back due our over-zealous rooster regrew the feathers during her molt. I asked previously in a different thread if we should cover her back with a saddle apron and was told that, in this cold weather, I shouldn't, as it can prevent Chanterelle from being able to fluff up her feathers and protect herself against the cold. I'm thinking I might still try it as the area covered by the apron is almost completely devoid of feathers at the moment, so she should still be able to ruffle all of the feathers that she still has, poor girl.