Now, I know this chicken has scaly leg mites... but is that lump also from the mites? She is constantly trying to pull it off, but its stuck on there good. I have treated it with vaseline and olive oil... it doesn't seem to want to come off. If this means anything, she is a Barred rock, a rescued hen who's foot got stepped on by a horse a year ago, so now she limps. Any ideas on what it is and how to treat it?