The cover these hogs live in are something you have never imagined in your worst hunting nightmare. Often the hunters have to enter these thickets down on hands and knees just to get to where the dogs have a hold of the hog. Yeah, the dogs are taking a risk. It's a risk I would not send a dog of mine into, but then my dog ain't into that kinda stuff. She's happiest yapping off at at errant squirrels.
You ought to see the complex body armour some of these guys are building for their dogs! I've seen forged stainless steel gorgets around the dog's necks that are articulated to give and move with the dog's activity. They add breastplates and shoulder armour out of thick saddle leather, too. Add a helm and a lance and they are ready for the round table!
And because of the amazing intelligence of the pig, very few hunting techniques are effective more than once or twice in an area. But because dogs can outrun the hogs, trail them into any cover a hog can scurry, and meet them on the hog's terms, they are often the only thing to put limits on reproduction. And at best, they are only holding populations steady.