I have 3 female and 1 male (at least that is what I ordered) Khaki Campbell ducklings that are now 5 weeks old. They moved outside on Saturday. They have a 10x20 grass lined run complete with pool and a spacious coop. I have indoor and outdoor feeders and waterers. The problem is, one of them feels it is absolutely necessary to pluck the quills of the new feathers out of 2 of the others ( it was only one being picked on until today, and now I see another one is affected). The poor things cry so much when this one does it. It is pulling the feathers that are coming in on the wings right out and the poor things are bleeding at times. The ones that aren't pulled out are broken off and scabbed over. This started about a week ago while they were still living in the house. I figured it would stop when they moved outside, but no such luck. It seems to happen more when I am around them or if they are swimming in their pool. Is there anything I can do to stop that one. I don't really have another place to separate the mean one unless I would bring it back in the house. Then it would cry and cry for its buddies though. I really need some help with this, any suggestions?!?!?!?!?!