Wills,
Birds just hate having their feathers snipped. We've (wife, kids and I) had parakeets for more than a decade. Just as with your ducks, when we pull out the scissors and the towel, pandemonium breaks loose. Oh, the drama of it all! We might as well be taking their heads for the uproar caused by the loss of a couple of flight feathers. I've bled for the privilege.