Please don't send them back to the city!
My parents lived in Denver until they both passed. They had a neighbor couple who would walk the neighborhood SEARCHING for what they saw as infractions. Then they would call the city and county of Denver and report the problem. When my Dad was dying of Lung cancer my sister had moved in to take care of my parents. She has Miniature Pinschers and the lady called the city to report the number of dogs and ALL of the barking that was affecting her health. The inspector came and when he heard what the problem was he left. After my father died, the city called a meeting of a 2-3 block area in their neighborhood. Apparently they told the homeowners (Including the gestapo neighbors) that they would no longer be answering the repeated calls from this area as they were becoming a problem and most were unfounded.
My sis has since moved into the house and these neigbors have moved to California, (sorry CA!!!) But before they left they called on her Lab mix Ruger. He has the sweetest personality, but she was reported for having a "BAD" dog and too many. The inspector that came to the house looked at him laying on the floor at his feet and shook his head. The too many came from her living in the country and moving into town and inheriting my Mother's dog. The solution is an agreement not to get anymore dogs until some of them pass on.
It takes all kinds of people. I have lived in my house 20 years and have never been called on by any of my neigbors.
Susan