Oh dear......I saw this thread and cringed. As the owner of llamas (guard and pet) I have to say, once the llamas smell the animal, see it is no threat the will generally leave it alone. when I get a new barn critter, I always bring it to the llamas and let them sniff it THOROUGHLY, then let the animal be in a cage within eyesight of the llamas for a while. Llamas are very curious, they will sniff any little critter that comes in thier pen if it will stop long enough to be sniffed. Most critters run, and so the llama will run, thus scaring the critter even worse. On the other hand, if it is NOT a critter that has been introduced to them, they will stomp it to smitherines. they are guard animals, and fine ones at that. mine are worth thier weight in gold.
Please introduce you little ducks to them, and all should be well. As a side note, my chickens LOVE my llamas, and snuggle up to them in the winter during the day for warmth.
Ok, went back and re read the post. I see they were not your animals......sorry. But to anyone else, llamas ARE good animals, and aweome guards. Not poultry killers.