I can speak from experience on this one. I have been attacked by dogs twice.
The first time I was walking to catch a 6am bus. As i was crossing the street a trained attack dog (doberman pincher) ran out of the ware house he was guarding into the street behind me. I didn't see or hear him. He grabbed my arm and dragged me to the ground in the middle of the intersection. He clamped onto my arm and didn't let go, just like you see on those police training videos. He was snarling and shaking his head. There was blood gushing all over my trapped left arm. Funny - I wasn't scared. I was
FURIOUS. I managed to stand up, reach around and throw some serious punches into the dog's ribs. I extended my knuckles the way you would to give someone a noogie. When the noogie-style punches landed I could feel the bones crack and separate. The dog quickly let go and did nothing else to me.
The second time I was walking my golden retriever in a residential neighborhood. Out of nowhere
two very large rotweillers sprinted toward us. They had no chains or collars. But, I do not believe they were strays. The came from the direction of a reputed drug house. Anyway, one stopped directly in front of us. The other was to my left and was attempting to circle behind me and my dog. The snarled, foamed and snapped. I desperatly wanted to run but knew it was the worst thing I could have done. I did everything I could to keep both dogs in front of us. I was semi-successful. I yelled at them, I backed away from them but they got continuously closer and more aggressive. One of the dogs grabbed my golden by the neck and bit hard. I could see blood surfacing up through her coat. I picked up a large, thick stick and slammed it down on top of the 2nd dog's head. I cocked back and played smashed its head again, this time on the jaw. Then, a 3rd time on the back of its head/neck. All of this happened while my golden was being mauled by the 1st dog. The 2nd dog backed off a little but continued to snap and snarl. Then, the 1st dog simply let go of my golden. To this day, I still don't know why.
We walked away backwards, while facing the 2 dogs. After we got about 100 ft away the dogs just turned and trotted away. I'm still very confused by that attack. I suppose it isn't too difficult to figure out why the attack started? But, more importantly, why did it stop? It was very weird.
The most important lesson I learned from both of these attacks is DO NOT RUN. Do not do it no matter how scared you are. Other than that, use your head and look for the soft targets. If the dog is gonna bite you let it have your arm. A few puncture wounds on the fore arm is much better than having your vital areas torn out.