Blackmouth Curs have varied historical documentation dependent upon region. Among them are the Ladner Yellow Blackmouth Cur from Mississippi, Red Blackmouth Cur from Alabama, Weatherford's Ben Blackmouth Cur from Texas, and the Florida Blackmouth Cur. The first Blackmouth Curs registered were Ladner Blackmouth Curs through the National Kennel Club in April 1964. Mr L.H. Ladner had such extensive written documentation of his family's breeding that the NKC recognized the breed. These curs are used to tree squirrel, raccoon, bobcat, mountain lion, and bear. They are used for hunting hogs and feral cattle. They also are distinguished by being used by the search and rescue emergency services.