Let’s assume that the neighbors who said it was a ruff-ruff dog are right.
What would prompt other neighbors to say it was snarling?
What would they think of the dog and the lady that they would lie about her dog snarling?
Better yet, let's assume it was snarling. Do we shoot all dogs that snarl from here on out? What if it was on the lady's property in compliance with the leash law, and it snarled at the cops? Would they still have been justified in shooting it?