The boys have favorites...and often will gang up on one hen...3 in a row sometimes! The girls are not overly pecked over. I had one that this was happening to, I quarantined her for a few days and put blukote on her head and that seemed to help. The Delaware roos seem to not realize that just because Duck is white, does not make her the same species as them....and often try to mate her...she just turns her head and clamps on to their wattles!
Hahaha! Good for that duck teaching them a lesson!