I certainly don't want them to bring any illness to my home flock, and neither do I want them to be uncomfortable here. At our county Fair there is a poultry exhibitor who wants to sell off his entire flock because he says he's getting too old & infirm to keep up with them. He has mostly bantam chickens entered and also a pair of iridescent green small ducks and a pair of small white ducks. No breeds are listed but I think the white ones are Call Ducks. My boys want to buy these white ducks because they're so adorable. I just want to pinch their cute lil' ducky cheeks, they remind me of the cartoon duck Yacky Doodle who used to rasp "Are YOU my Mama?" ~BUT~ One of the ducks, maybe both, have a whitish spot in one eye. I asked a man who knows a lot about poultry about it & he said it isn't cataracts, but a sinus infection that affects the eyes. These ducks don't act sick, don't sound wheezy or goobered-up. But could they still be harboring some virus that would affect my home flock of ducks, chickens & geese? ~ALSO~ Could I keep little Call ducks out in the yard with the rest of my flock? I have 2 Pekins, 18 Khaki Campbells, 2 Embden geese, and a large flock of chickens. Would they get picked & pecked on by these others? I do have the option of keeping them in a pen with a pool during the day & latch them into a crate at night before I let the other ducks back in. This pen is not covered, & I would be concerned with hawks attacking them. Are Call ducks clever & wary? I could also keep them in another pen that is covered & currently houses just a few little bantam chickens. Would 2 Calls make a big splashy mess for the chickens? Thank you for your imput, the Fair ends Jan 31 and I must decide by then!