I have four 7 week old ducklings - I got them at 4 weeks old. One of them 'Mobey' has started to become aggressive. She not only nips the others but has started to bite the family and 'hold' onto the bite and not let go. I think this may be an act of becoming 'top duck' however, obviously we don't want her biting us. Has anyone any ideas how to train a dominant duck not to bite? The sooner we act the better. We've had other ducks and never had this problem - however, this is the first time we've brought up ducklings so there may have been a mistake in bringing them up along the way! Any advise would be of help! I keep saying 'no' and holding her beak shut for a small time but that's not stopping it and is it showing voilence to stop violence? Any help or past experience would be highly helpful!