Lone hog, medium sized, maybe 100 lbs, shot at and missed, ran into woods in an area not heavily hunted... how far does he run?
And what does he do when he stops?
Has he been hunted before? Where is the nearest cover? Each hog is different and had different experiences and the same can be said for sounders.
Here is what I have seen happen. I have shot at a lone boar that I assume had never been hunted before that moved no farther than a few feet, looked around, and went back to rooting as I tried to deal with a stovepipe malfunction. He obviously did not understand any significance about the sounds he heard. On numerous occasions with a singular shot, I have seen hogs only move a short distance, 25-50 yards, before stopping. Most commonly, I see hogs that run to cover when shot at, cover being anywhere from a few yards to well over 100. Where they go after they get to cover is unknown. If you are shooting at a sounder and they have to run a long ways to cover, there is a decent chance one or two will stop and turn and try to assess the threat they face or maybe to see if all the others are coming (who knows?). Sometimes I have seen hogs that just run to the edge of the woods and stop.
Hogs seem less spooked by suppressed fire than by unsuppressed fire.