HGN, are they meant to be working that hog or just annoying it?? I can't see any tusks on it ?? just looks like a tame pig, wild pigs have tusks and would throw them terriers everywhere, WM
I'd say its more a feral pig than a wild boar... Should a terrier get a bad grip I've no doubt that pig would throw them about. A good snout hold would help calm it down though...
I would say thats right