I know how you feel. That has happened to me and its not something I would want to go through again. In my case, there were 3 dalamations, ALONE, running on the street back a forth like mad dogs. In fact, they WERE mad dogs! I was out for a walk and all of a sudden those 3 appeared, barking and growling with their huge pointy teeth. My heart was beating SO hard; I screamed at them, waved at them, nothing worked. They attacked me and I fought back and got them off me. Then I ran (which I know I shouldn't have) and they followed, so I ran faster, and they followed even faster. I said a prayer and asked God to save me from them, and right that second, miracilously, they changed their mind and disappeared. I thanked God for answering my prayer and ran home with blood dripping from my hands (they made me fall in a rose bush). That was just one of my experience with big vicious dogs, but I've had many more. That's why I dread dogs more than anything, although I'm not that scared of little dogs. They seem to small to be afraid of. I know most big dogs are very sweet though. Its just that I had experience with the bad ones, and they were all either without an owner, or the stupid owner wasn't watching them!