Got bit once, nipped really, on the calf, but he did break skin. The dog backed off when I stopped. Walked the bike up to the house and the owner was very apologetic. By the time the owner came out the dog had become friendly. They were down here on the coast for their vacation. No problems since.
Been forced off the bike several times, even had to walk the bike about a quarter mile down the road on a solo ride when two dogs came out at once. Same two had backed off on a previous ride but there were three of us together. Recently got some Halt and it seems to work. Figure I may be saving them from getting hit by a car or permanently injured by someone more aggressive than myself. Either way I have decided not to take a chance on getting bit again if I can prevent it.