Can anyone help a Rude Bossy Duck please?

[springlamb]

One of my two lady ducks has suddenly turned into The Iron Lady. They have always been together and been laying since December. They are usually very happy. Lately, one of them has taken to laying their egg later in the day, or sometimes not at all.
But suddenly, Hedwig is very noisy, and standing on Pigwidgeon's back a lot and striding about the garden aggressively. I even caught her standing on the Golden Retriever's back early on. She's marching into the kitchen, she tried to take a stick off one of the dogs, she's gone batshit crazy. I'm living in fear.
I would like to LTB, but if anyone has any suggestions as to what's going on'd be very grateful.

[FrancesNiadova]

Sounds like Brenda from Four Ways Farm!
(Sorry, not much help!)

[BinarySolo]

Get a drake? My ducks occasionally mount eachother so I'm guessing it's a dominance thing but having a drake might help. We have a drake it's supposed to make ducks quieter as they don't call for a mate.

I'm sure I've heard of ducks and chickens changing sex if they're not kept with a male too.