Constantly barking dogs can cause a world of misery. I’ve a familf of idiots 2 doors away with lots of dogs that live outside. They bark at all hours of the day and night. Everyone around is sick to the back teeth of them. Nobody will confront the family though because they’re really nasty thugs. I would move in a shot if I could afford to.
It’s possible that your neighbour has been irritated for a while before deciding to knock on your door.