You really dont want this problem. We had 2 nesting pairs on our pond when we bought the place 10 years ago. Yesterday I counted 42 grazing around on the grass and crapping on everything. I have had my dog chase them but they just go into the water. I even tried shooting at them from a distance with a shotgun. When the shot hit the water, they just came closer thinking it was food hitting the water. I have to stand guard when I throw out corn for my chickens, guineas and peacock, otherwise the geese come up and eat it all.
I got my hunting license one year and killed about 14 of them and the killing scared some of them off for a while but they eventually came back. I guess it is time to kill off a few again at next hunting season. Otherwise they overrun the place.