A pack of Chihuahuas. Seriously I was confronted by one of those eight-pound crazy maniacs in our subdivision many years ago. The damned thing came flying across the street at me and followed me all the way home trying to get to one of my ankles. Not embarrassed to say the thing scared hell out of me. And I’m used to big angry dogs. Any dog no matter what the size can inflict serious injury on a human if the situation favors the dog.
I’d give one of those dogs a swift kick in teeth if they started chasing me.