Years ago when my then wife was taking the kids for a walk in the stroller, with a big short hair and a cocker with leashes attached to the stroller a German shepherd jumped out of a screen door at a residence a couple of blocks away and confronted the dogs/ kids wife . She unhooked the the leashes and, well it didn't turn out well for the shepherd , ended up jumping through the screen back in the house it came from, a little worse for the wear and never Even barked at them when they pasted by again. They usually took the same path on their nightly walk but this time the dog went nuts, for what ever reason, after he got his ass kicked never bothered them again