I must have seen more than a thousand dogs who are comfortable if you greet them by standing sideways and letting them come to you but who will lunge and bark aggressively, and possibly bite, if you stride up straight toward them, stare directly into their eyes, and reach your hand over the top of their heads. Polite dogs not only avoid direct approaches, they don’t greet unfamiliar dogs by slapping their paw over the head of the other dog.
