We're having the same trouble as Beefcake15. We've had chickens for 3 years and our dogs have been okay around them, ignoring them. A few months ago we got some Muscovy ducklings. Last weekend one of the kids let our Lab/Heeler mix out. We weren't letting her out while the ducks were out unless we were out also. Anyway, by the time I realized she was out, 2 of the ducks were dead. I don't understand why she did this, but is okay with the chickens. I do realize it doesn't matter, we have to have more control over her & our other dog. I've thought about fencing in the ducks, but is that just putting a bandaid over the real problem?