Wow. I've NEVER seen a dog with that many quills in him. Usually the porcupine slaps the dogs once with it's tail in the face, and that is that. I would venture a guess that perhaps this poor unfortunate dog is the dumbest dog in the world, and simply kept after the porcupine. I'd say that's more than a couple slaps of the tail.

I agree about them not learning ... my ex's lab Bubba has gone after too many porcupines to count. He keeps pliers and gloves on a shelf by the back door. The dog will NOT learn.