One of my hens, I saw had some wierd lump on her face, it looked like her earlobe, but with no feathers I wanted to catch her to inspect it, but the geese chased her away and I only just now have been able to catch her. She is a Black Australorp. And when I caught her I noticed there are now two bulgy pale lumps on her that seem to be some sort of skin/comb/ear infection. She doesn't seem too bothered by this, but what can I do to get rid of it? What cause it/What is it and is there a preventative?