That's exactly what you need to do.
Call animal control - then it won't seem to police that you and your neighbor are just feuding (even if you are). For the most part, especially in cities where a leash and collar are manditory, animal control has no choice but to take an "unmarked" dog to the pound. Some will even pick up a dog with a collar if he's a good distance from home without his owner's supervision. Then they'll call the number on the tag from the pound and tell the owner to come pick up the dog.