Wild hog and pig are so not even close to being the same; if you teach them on a domesticated pig, and then take them out to the woods on a 150+lb wild boar hog with tusks, they're going to get hurt. I've always trained mine with my own hogs. You catch'em in a hog trap, and stick'em in your hog pen, make sure they're smaller sized, about 50lbs. Then we've always trained through the fence first, my six and seven month old already know what the hog pen is. They haul ass to it every chance they get, and will follow the hog along the fencing, following exactly where his head is. And pretty soon here, they'll be let loose on one of the hogs in the pen, we don't train without precaution anyway, taser, couple extra hands, and a break stick. I've never had my dogs get hurt with this training method, and neither has the friend who taught it to me, who's dog singlehandedly took down a 150lb boar hog. Domesticated pig is just that domesticated, and it's rather cruel and pointless in my eyes to train a catch dog on one. We all have our methods of training and opinions, and that's one I find inhumane for a farm animal, and not a goo enough training method for my dogs.