Is this the start of a drake feather?

[sourland]

It does not appear to be a drake feather. "If it quacks, it's a hen." True for all mallard derived ducks. Ducks are extremely sexual and it is very common for hens to mount other hens - especially when in water.

 

[WannaBeHillBilly]

I have two drakes and the females still mount each other all the time
I think it's just what they do. If it quacks it's a girl.
*Unless it's one of these rare occasions where you have a hermaphrodite.

Is that possible?

 

[chickens really]

Definitely nothing is wrong...

 

[happy duck]

Probably molting. That is what my girls feather look like during molt(which is right now for mine). She is most likely showing dominance.

 

[shawluvsbirds]

Is that possible?

I suppose it is. I've heard of it but haven't personally seen it. It's possible in humans so I see no reason it can't be possible in animals