You don't see it a lot any more because most folks kill the hogs. People that used to work hogs would clip the canines flush with the other teeth so the dog wouldn't tear the hogs up.
right and if they have no k9 teeth they cant hold a big hog they have to bay him, you see alot of older people doing it, and tmatt a catchy dog is gonna get alot more pain from being catchy than getting a few teeth clipped out think about it, and your right im probably not smart enough to train a dog i mean i just started hunting yesterday