I do know that he stopped his pursuit because of his wound.
I grabbed him, looked it over real quick and determined it wasn't life threatning. I slapped some sense into him real quick and sent him back on to the hog.
These two comments leave me questioning the dog. In an ideal world, I don't want a catch dog to think about self preservation. I have often said the day Tyson quits a hog, is the day he is no longer a catch dog. I haven't been in that position yet, so I can't say how I will feel if it ever actually happens.