Hello all. I have this hen that has lost her feathers on her back. She's been this way for about a month now I'd say, maybe a little longer. I thought maybe she was molting at first but that doesn't seem the case. She seems in good health, she eats, acts fine and is still laying. She doesn't seem to have lost any weight either. Also none of the other hens in the flock have had any problems. I was thinking maybe some sort of parasite but I would think the other girls would show the same symptoms too. If anyone could give me a little advice I'd sure appreciate it. Pretty new to owning chickens and haven't come across this before. Thanks!