How do you deal with unfriendly dogs?

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3. by usually panicking then falling ..

seriously this is a huge problem because some people use those expanding leashes that expand when they aten't supposed to .

I try to ride very defensivley around places with ,dogs , skate boarders ,cell phone walkers , organized group rap session jogging get togethers.
I go like hell when I see some wide open spaces knowing that where I ride isn't my private gym or race track which sucks because I love to go fast but know I am at 67 years of age not going to be on the cover of Bike Porn Magazine riding a 13 pound 30 thousand dollar bike dressed like a meat puppet in spandex ....oh but I digress

I don't know you almost have to have a dog sence when you're going going faster than you would like to fall at and slower than some dogs can run .Sometimes I will ride where I am familiar with the surroundings and still get unpleasant surprises = if you ride alot you will fall but its worth it in the long run or we wouldn't do it .