The worst dog I've ever seen was a redtick/bmc cross, there, now the two claims cancel each other out.
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Most often your gonna get dogs that are less than the dogs your breeding. Even among whoooowee badass 10 hog per day dogs, most of the litter will not be as good as the parents. I say unless that dog AND bitch gives you an instant stiffy very time you see them them hunt then there's ZERO reson to breed them. If they are that good, find somebody who catches the crap out of hogs and has Reputation as having a WHOLE YARD FULL OF BADASSES, and go hunt with their dogs a few times, if your two dogs still float your boat after all that then go for it.
Take note, best advise ever...