I have fought pigeons for several years. They poop more than any bird I've ever seen. I have several tractors that I value very highly and these stupid birds seem dead set on vandalizing them. I would venture to say I have killed 20 of these pests in the last few years. Is there a better way to keep them away? Pellet guns rarely kill one and .22 goes through the tin. Maybe a bird poison.Is there such a thing?