Herding dog instincts they nip and tear to drive and make run so they can pursue again they dont like to " bay" . They like to bite then they dont catch like catch dog they thrash and tear to bring "down" the prey like a wolf that was trying to kill to eat and bring something to the ground.
Think about it. hogs dont work/act like sheep. Thats why so many different breeds were developed.
I bet if you get a hog that wanted to stand still and bay the dog would coherse it into running and one that want to run grabbed and and then get the ears and extremeties ripped off, just thinking outloud. How do they work sheep? as they are not even known for working cattle much at all that I know of.
Herding are "HEELERS" Stock dogs are Head dogs, or lead dogs.
why arent catahoulas and BMC used on sheep? because they are crazy enough to chase them around