Most hog and bear hunters around here use Black mouth curs, fiest, Blue lacy, or walkers. Most are mixed to some degree it seems.

Not sure the other breeds, but the black mouth cur is a herding dog originally.

My neighbor runs 2 parsons terriers with his bear dogs( Rhodesian black Mouth cur mixes. The parsons are ferocious little beasts when hunting, and are always first to the tree.