Oh my goodness, those ducks have it made!
Honestly, I would try to work with the neighbor, but if that's unsuccessful, I would rehome the offensive one and hope another doesn't follow suit. I'd hate to see all your time, money, effort, and love go to waste by losing them all!
Best of luck to you!
I dont have Calls, but as Ravyn says, that's their nature and I expect she is right that another would likely take her place.
You could try rehoming and see what happens... It sounds like you have an awesome setup though! :) How long have you had them, and what's your long-term goal? I mean...