Really....I shouldn't respond aggressively to an aggressive dog? I own a big, powerful, well trained dog. If she was to act aggressively to someone I would pound her face in the dirt. If I have an encounter with an aggressive dog I think both of us are going to get very hurt. I am sick and tired of aggressive dogs that are out of their owner's control. I fish to relax, not to feel threatened. If you don't have control of your dog, and it has aggressive tendencies, please keep it on a leash.