I don't get the BS about get a "real dog". 10x has an issue with a dumb ass neighbor who refuses to "control" their animals. I doubt a stun gun will do much unless you can get within arms reach of the dogs. How about a walking stick/staff? Had a friend who had an aggressive neighbor dog attacking his while on walks. He used pepper spray on the dog once and had no further problems.

Dogs can be unpredictable animals, no matter what size. All three of mine have been socialized and are friendly around other dogs and people. They rarely even see a collar but when we are in town or around other people/dogs they get a leash. I don't care how kewl your dog is, if it rushed me in any type of an aggressive manner I will take action to protect myself/dogs.