I have 2 silkie roos. They are each in separate cages next to each other. Same conditions, same bedding (straw) etc. We noticed that one of the Roos has this growth on his feet. Its tan colored and looks almost like those pictures you see of the tree man..you know, he grew bark all over him? http://www.huffingtonpost.com/2008/04/14/tree-man-has-surgery-want_n_96656.html Anyways, we brought the roo in because he had alot of poop matted on his feet in the growths. I washed his feet well and put him in a box to dry. When we went back later we found some of the stuff had fallen off his feet and left clean skin underneath. What the heck is this?