Female Pekin ducks(pretty sure female) fighting each other & beating up my chicken.

[PagosaMark]

Chicken's neck defeathered, 1 ducks defeathered w/blood both ducks aggressive. Outside their coop the bloodied duck is the aggressor. When I separate them, they sit opposite each other and quack like they miss each other. The one with its neck feathers missing definitely quacks. They both play grab the neck feathers and ride, is there anything to do?

 

[Canadian Wind]

Sorry no one answered you yet.

Separate them. Keep them apart (and away from the chickens).

What are you feeding them? Do you have any pictures of them and the wounds? The only thing I can think of is that they are deficient in something (protein maybe?).

 

[PagosaMark]

They get a couple handfuls of Fly fiesta morning & afternoon, & Cluck & Co all flock, all they can eat. They pulled the chicken's feathers out in the same spot, but no blood. I think she figured out to stay on her roost. I only have 1 chicken left so I moved her in with the ducks. She has a roost and a box a couple feet off the floor, so as long as she's up there she's safe. When they're outside their house, the one with the missing feathers is the aggressor she is biting feathers in the same place and climbing on top, and when I separate them, she comes and bites my pant leg.