I'm not sure if this is a disease or not. But I have noticed under my 6 month old Ameruncana hen that she has a whole cluster of white, hard lumps under her chin. They are very close to her skin so I cannot cut them, and I have soaked them in water but they do not seem to soften at all. I think they might be just dried feed but I'm not sure. Any ideas as to what they are and how to clean them off of her? Thanks.