For human skin morphology hematoxylin-eosin, Period acid Schiff (collagen, basement membrane, granulocytes, glycogen in epithelium), Alcianblue (hyaluronic acid) and combination of Alcianblue with PAS, Giemsa or Toluidinblue for Mastcells, Elasticastain (elastic fibers).
IHC on skin: e.g. pancytokeratin for epithelium, CD31 for endothels, S100 for melanocytes
Maybe these can help you, but I have no glue about goats ;-)