Duck behavior help

[FFFarm20]

What is this behavior? The appleyard has done this with both my male and female unknown breed

 

[Isaac 0]

Likely a dominance issue, especially when young, they're trying to sort out who top gun, and who's not, this is there a way of establishing dominance over each other. I'm assuming they are still young? Give it a few more weeks and the drake won't tolerate a thing from that hen.

 

[FFFarm20]

The appleyard, possible 2 saxony are the only ones doing it. The appleyard has started it both times. Those 3 plus 1 of my muscovy are 11 weeks while my khakis are 12 weeks and my last 2 muscovy are 8 weeks. The muscovy tend to stick to themselves