Just buy a pregnant black mouth cur gyp and raise all of the pups and train them yourself with one old dog that is dead broke, not every dog breeder puppy mill out there, find somebody with a older gyp who used to start her own hog and bayed it solo and rolled out good, good lucck.
x2, she doesn't have to be pregnant when bought but buy her to breed her on the first chance you have and raise and select the best pups to the best of your ability.