I've been wondering about this, and since I have someone who wants to stop by just to view some birds, I am really thinking about it. For biosecurity reasons, do you refuse to let people in who have chickens? Can humans really carry disease on them like that? Could someone walking in get my birds sick? I do not have a "barn" per say, but a shed coop and the birds free range. We can keep them in fencing if someone is coming by, could the person look at the birds outside the fencing or is that a no go since the birds will be free ranging where the people were standing? So many questions!! I wish I had heard about biosecurity awhile ago, but it's never too late.