I recently rescued a bantam hen form squalled conditions. Her feet are covered with leg mites which led to a build up to what I can only describe as calcification of her entire foot and leg. It is like this super hard layer of extra skin that does not have the normal scales or color even. I pulled back a piece of this callus and it revealed what looked like maggots. I don't know what to do with her. How should I go about getting the callus off and treating the poor thing? I have never seen anything like this in my entire life.