I have one hen who broke her middle toe at that upper joint, Doug. It swelled up and due to the swelling, it hit the ground at that larger area and actually caused bumblefoot on the bottom of Caroline's broken toe. That could be what it is, but I can't say for sure. With bumblefoot, there can be a very tiny entry point/scab, not the usual big one in the center of the pad. Poor girl, it does look painful.