I've got a flock of 10 juvenile Black Austra's in a mobile enclosure until they're big enough to deal with the barn cat. I just noticed one of them has something crazy going on with the feathers on her breast, and I thought it looked like damage from some kind of parasite. Can anyone tell me what this is and if/how I need to treat it? I've looked a couple of times since Saturday when I took the photo and I don't see any of this on the other girls. I uploaded in the highest quality allowed, but the original image is a higher resolution. If anyone needs that, let me know and I can make it available as a download link.