An attack itself is harmful, even in the absence of a physical injury.

It emotionally impacts OP because the simple every day act of walking their dog is no longer peaceful…they have to be on guard for their neighbor’s aggressive dog that is allowed to randomly roam loose on the street.

Repeated attacks (even without physical injury) will likely result in the dog being attacked developing aggressive behaviors.

There is way more to this than “dog feel no ouchie hurtie, it no big dealy wheelie,” and it is not moronic to expect dogs to be kept on leash in public spaces.

There is a product called SprayShield made for this type of situation. It is a citronella spray that comes in a pepper spray style dispenser. It is safe for dogs, but repellent because they don’t like it.

https://store.petsafe.net/sprayshield-deterrent-spray