Barking dogs can drive you nuts, but deadly violence is rarely the answer. She should have gone to the neighbor’s front door and screamed obscenities until someone stopped her (without violence).
We had neighbors that had two shepherds that barked all day and all night.
A plan was formed 10 or so neighbors called animal control.
Dogs were not seen or heard from again.
I don’t like calling the authorities but it was that or a less pleasant alterative.