Just an FYI, when a dog is attacking you, jam your hand, arm, foot, or whatever it is that it's trying to bite, down it's throat. I assure you, it will open it's jaws and try to get away from you. It's a hard thing to do, because your instincts and reflexes are telling you to pull away and run, but that's the worst thing you can do. Here's a good little article on dog attacks, http://www.fightingarts.com/reading/article.php?id=336