I have been attacked by two dogs. Only one bit me on the leg. I was going to an art lesson, and my teacher's pet nipped me on the leg. I was wearing jeans, so his teeth didn't break the skin and I was ok. It scared my more though. Thankfully, my teacher came out of her house quickly and retrieved her dog into the house. The dog was a small dog, thank goodness.
New approach...all fours!
Thanks for the mental image, Didge!
If a dog begins to act aggressively keep your face towards them. If you have a paint box/bookbag/purse, keep it between them and you. Do not scream...high pitched noises can cause an attack, showing fear makes you a target. Don't run, prey instinct takes over and they will chase and they will attack.
I've yelled at them, roared like a tiger with hands up like a monster (making myself big) and run right at them. So far I've never been bitten.