Female v Female Agression Ducks

[aart]

Maybe it's because she is about to start?

That thought crossed my mind.

 

[shawluvsbirds]

I would give the bully a time out.
Most likely it's just hormones, but check your buff duck over for any injuries or signs that she is not feeling well. Sometimes if one is sick or injured the others will pick on the "weak link" it can be brutal.

 

[Raenh]

And that is why until I'm sure shes back to full fiesty health, speedy is sleeping in my room still.