More details about the panicking behavior. The trigger was if I was anywhere in sight. The Appleyard and three runner ducks would crouch, fluff their feathers and start to squawk so loud my ears would hurt and dash madly to and fro in the pen or in the yard. Once the panic started the two other female runners would join in. The Buff duck, about a year older will join the mad dashes back and forth but remains pretty quiet. The Appleyard drake remains fairly calm. Again, I've had runners in the past and never saw anything like this, and the Appleyard is noted to be a relatively calm breed, much calmer than runners. My question is what's different about the four jet-engine-level squawkers? It occurs to me that I ordered 'day old ducklings' which I'd think would acclimate to seeing my huge predatory visage and soon think nothing of. But what if the supplier actually sent me two-day and three-day olds, who essentially had never seen anything but other ducks during their imprinting period???? Just an idea...