I have a cousin that breeds squirrel dogs. He won a bunch of championship trophy' s with one in particular. He has a registration for " Tree Curs" . I can' t remember the name of the grand-sire that he started the line with, but I had a grandpup out of him, and it was the dang smartest dog I have ever had! I never got to hunt him tho, because someone stole him. My cousin is located in Muskogee Oklahoma. Do a search for Cur or Black Mountain Cur/Mountain Cur or Treeing Cur.