I am out in the country right now and just had an encounter with a big lab/pit mix. I was riding as he shot our of his yard and came charging at me. I stopped, yelled NO, called him over and he was the sweetest thing in the world. Two minutes later, he went home and I continued my ride. In my area, these dogs get used to chasing cars and you are just another chase object to them. If you talk and personalize yourself, they lose interest. This may not work all the time, there are always the aggressive dogs, I got lucky. I choose this option instead of getting knocked over by this moose.