Hey guys, I need some help. I have 7 BO and some seem to have a probelm as shown in the photos. They seemed to have lost their feathers on their butts over the winter. It's starting to get warmer now in NJ. Some aren't as bad, but the one in the photo is probably the worst. At first I thought they were molting. Could this be something else? After some research here I read that possibly protein problem? I feed them Dumor Layer Pellets and every other day I give them scratch grains 20oz cup size for 7 chickens to split. I've looked around, I don't think I have a mouse problem. I also read maybe they could be plucking each others feathers which I think is definitely a possibility. Any other thoughts on what I should do? Thanks!!!