I've had that happen so many times. There's a lot of people that let their dogs roam around here. I don't care if there dog is loose if it stays in their yard...or even if it comes over for a friendly sniff...its when it comes charging up to my dogs snarling and growling that I have a problem. I have been known to act like a crazy person when this happens. The first thing I do is get in front of my dogs and yell "Go home!" to the other dog. Usually a bit of yelling/waving my arm at them is enough to get them away. I have had to use the end of the leash and swat them with it...I've had to be meaner than that too, I don't like to, but I can't have my dogs attacked. Nebo tends to not be very friendly to dogs running up to him growling either. If the owner is nearby and doing nothing (you wouldn't believe how often this happens...they sit on the porch and watch ) trust me they will hear about it. I have never tried to outrun the dogs, I stand my ground and get the other dog to back off.