SRS, a stick and a pocket full of stones is my choice. If a country junkyard dog is barrelling at me with snout wrinkled (has happened several times over the years), rocks are first defense. I have lousy aim, so the stick is for closer quarters. Usually yelling angrily and brandishing the stick is all that's necessary. Beyond that, things just get unspeakable, so I won't go there in this thread.