My oldest 3 ducks, 2 female pekins and a make saxony are kept together. Pete (girl pekin) is mean to Bernie, my saxony drake. Booster pack, my other female Pekin is not. Yes I'm sure both pekins are female. The interesting thing is Pete is only mean and goes after Bernie when booster pack is also around, which is all the time, just have separated them for this experiment. I've only ever seen Bernie mate with booster pack and he obviously doesn't care for Pete. Why does Pete only attack Bernie when she's with her friend? Are they competing for Bernie or something? The girls are inseparable and Bernie is my daughters favorite duck so i don't know what to do.