hi all, I was wondering about a health question - Our neighbors some laying chickens they keep in a single pen, about 400 feet from our property line. My chickens are in tractors that move around, anywhere from a couple feet from the property line to a couple of hundred feet. How far would be a good distance to make sure my birds don't catch anything the neighbor birds might have? They are south of us, and the wind blows west-east most of the time. Thx
