I kind of looks a little like a blister like maybe she got pinched there real hard. Did you pull out her fluff around it or was it already gone? Have you noticed the other chicks getting after her? You can see the fluid move when you press on it? If I was pretty sure it was a blister, I might puncture it with a needle to let the fluid out and let the healing begin.
Maybe some one else has another suggestion? Maybe you should post it to a different thread?
Maybe some one else has another suggestion? Maybe you should post it to a different thread?