If a dog attacks you, the following tactics can reduce the risk of being bitten:

• Stand still. Running incites hunting and chasing instincts in the dog.  
• Loudly and firmly shout "Sit!" or "Down!" at the dog in a dominant fashion.  
• Put something (e.g., a trash can lid) between you and the dog, or pick up something and pretend to throw it at the dog. Doing so may convince the dog to leave.  
• If you are thrown to the ground, protect your head.

Once you are safe, contact animal control officers and inform them about the stray dog.