Male duck goes after rooster

[Danielledematteo]

I hope I’m positing this in the right spot. I have 2 ducks (1 male 1 female), 1 rooster, 4 laying hens (currently) 12 more hens joining in 3 weeks.
My male duck goes after my rooster any time he tries to do his thing to the chickens. The rooster does do a dance, but each time he tries the duck goes after him.
Is this something that’s normal in a flock or something I should be concerned about?

 

[nuthatched]

Seperate your drake out, he can hurt your non duck birds horribly.