All of this is overwhelming. I have never had a single case! These all show up at the same time. I need help figuring out what is causing the bumblefoot. Nothing has changed. In fact, I added a lower perch in my coop because of the addition of a bantam about 6 weeks ago. Am I missing something. Do you think maybe they are vitamin deficient? That is unlikely since they free- range right? Could it be mites? Their legs looks good, but I did have a girl from auction who I've been eating for leg mites. Could fungus be eating holes and letting in the Staph? Maybe that could account for the black discoloration I am seeing on their legs, nails and feet? That is my best guess. I am at a loss.