How well do(did) you get along with the neighbors? If you are friendly with them, talking about it would be worth a try… you could also look into your local ordinances, and see whether roosters are even allowed where you live. I did a very quick search on the BackYard Chickens forum as well as the web; it seems that although technically there is a surgery for this, it’s very complicated and usually fatal. (I know- that’s starting to sound pretty good, right?) Unless they are neighbors from hell, I’d try to work things out.