Living in what I think is *the stray dog capitol of the world*.....I see this all the time. As dorky as it is I stand my ground. Hold the dogs behind me, hold my hand out and say "NO!" Stomp my foot at them. Anything to let them know These are MY dogs and I don't want you here! I would never run from a dog. Makes the dog think I fear him and could make him actually attack me. If I do what I normally do it makes the dog think twice.