Originally Posted by
trek800
Always keep your bike between you and any dog that is chasing you. Get off and walk away with the bike between you and the dog. Never trust a dog that is chasing you.
Another dog advice is, do NOT try to out run a herding dog, unless you are very, very fast with endurance. Herding dogs have the instinct of a Sidewinder missile to carefully calculate your speed, direction, and acceleration to plot a perfect intercept course. The clearer the line of sight, the better their accuracy.
I know this from experience, where I learned about the bike between you and the dog technique, and also from having a Australian Shepherd and watching him with animals in our yard and with other dogs at dog parks. He was great with humans though.