I think my goat that's in milk has mites. She has white crusty skin around the undersides of her hooves and above that on the back side of her legs. We don't see any bugs, just white crusty skin and some thin cuts/cracks. Is this mites? The dry doe doesn't have any of this on her legs. Please, any recommendations for natural treatment? If not, what do I use to treat this chemically, at least mild enough because she's in milk???