Thanks for the advice, Dogmama--I'm sure we can all use it at one time or another.
I, too, own dogs, and they are happy, friendly, rambunctious sorts who would probably chase a person on a bike just because it would seem like fun to them. Fortunately for all involved, I don't allow them to do that. As cyclists, we can't immediately tell the difference between a dog just giving friendly chase and one who means to do us harm.
Also, even a friendly dog can do some damage without meaning to. About a month ago, I got a nasty scratch on my calf because I cycled past a house where I know the dog and she knows me, but she was in her front yard, unsupervised, and when I rode by, she came after me, and when I didn't stop, she pawed at me. After that, I did stop, and she lost interest. I relate this little tale hoping that no one else will be as foolish as I was to think that just because you know the dog, you can accurately predict her behavior or that behavior will necessarily be harmless.
In the future, I'll treat all dogs, especially large ones, the same--as Dogmama suggested--stop, get off the bike, keep the bike between you and the dog, and order it to stop and go home in as deep and authoritative a voice as I can summon up. This strategy has worked well for me whenever I've been smart enough to use it.
--J**
"Do I contradict myself? Very well, then, I contradict myself." --Walt Whitman