Female Muscovy Duck Running Other Duck Away

[fourkidsandduck]

I have two female Muscovy ducks. One (White) is broody and sitting on her nest. She comes out once a day for food, water etc. The other female (Black) is not broody, she sleep outside and does not care. They are the same age. I also have one drake.

The white female keep running off the black female when she comes out. She will also pull on her wings etc. I have uploaded a video. Does anyone know what is going on? Is the pen to small for both female ducks?

 

[Amiga]

You may need to separate them for a while . . . @Miss Lydia keeps Muscovies - in fact, there is a Muscovy thread that if I were you, I would post on - I lose track of who keeps Muscovies.