unleashed dogs

[10x]

Yesterday evening, again, some idiot won't leash his three big dogs while walking. From across the street they charge my little cocker and scare the heck out of her. yipping and crying while I try to grab the big dogs and get them away. That didn't work at all.

I chewed out the owner but that doesn't make me feel any better.
They dogs weren't attacking just surrounding us and no injuries so it was not a shooting situation.

Can anyone recommend a small stun gun, cell phone size, that I could carry?