My Black Barred Plymouth Rock was lifting its left foot and limping. We thought at first bumblefoot (we've had it and treated it on 2 chickens in the past), but this is different. It has no black scab. It is swelled all the way around and the nail is intact. We soaked it, put neosporin and disinfected it and wrapped it. It looks the same after a few days. We tried piercing it (hence the drop of blood you can see in the picture). Squeezing it produced nothing but blood. We disinfected and wrapped it again but don't know what to do or what it is. She is currently wrapped and in a large cageso she doesn't get it dirty. We are clueless, it doesn't meet the description of mites or gout.