If my neighbor has a flock he chooses to maintain with antibiotics, vaccinations, medication and what not, covers his pen all around so our flocks never even look at each other yet a wild bird drinks from my flock's waters then his flock's and poof now his birds are sick with what my flock no longer suffers from yet are carriers of. He put alot of work and effort in raising his flock as he wants. But I have taken losses, treated birds and culled if necessary and all told have also put in alot of effort to get my flock just like I want. Am I the jerk or did I just pick the better way to raise my flock? I mean even if another person's flock didn't infect a flock wouldn't a wild bird eventually? After all, they are already resistant. If anything haven't I had to suffer losses, culled etc BECAUSE others have tried to undo the natural order of things by breeding with vaccines, medications etc?