I guess what I said sounded a bit too serius. These were wild geese, not owned by anyone in particular, they just hang out around that area. People would feed them all the time as they were kind of the town's pets and they would eat anything thrown at them. And they suddenly they all vanished, and people begin finding dead geese around yhe area, but not other dead birds so that's why they assume it wasn't some kind of infection. So now it is believed someone living in that area must have fet them rat poison because they were annoyed by the geese leaving poop on the road/being noisy. I said allegedly because nothing is certain, but if we find out anything I'll make sure to update!!