Does anyone know of any pictures of this? I think Diesel may have it on one of his pasterns. He is out in a dry field all day, but his pen gets muddy and gross with all the snow. It's only one one foot, and it's like...clumps of something. I tried to pick it out and some of it came off, but he was definitely ouchie when I messed with it. When I am not messing with it, he seems completely unfazed by it.