Very few vets will bother performing surgeries on birds, too risky putting then under anesthesia.Additional info: I would be using a professional veterinarian and not doing this myself.![]()
So they will do it without any anesthesia, if you find one who will do it at all.
Roos usually only get aggressive through improper raising.
Everything else isn't really an issue though if you can't have roosters, the town won't care if he's crowing or not.
Have you put him on Craigslist? Rehoming or eating him is a better option than putting him through a risky surgery.