Sexing my ducks?

[Wyleiria]

Could some please help? I don't know if these are drake feathers, if these are quacks or anything! My ducks are about 11 weeks old, a buff and a magpie. Here's the "quacks?":

 

[Amiga]

The video is private - beautiful ducks!

 

[Wyleiria]

Oh no, thanks for telling me. This is the first video I have posted to YouTube and it's sole purpose is hoping I can get help sexing these guys as I suspect boys and I don't want them hurting my chickens

 

[Amiga]

Yes, they are drakes.

 

[needlessjunk]

They are super cute little boys.

 

[Wyleiria]

That's what I was afraid of. I can't keep them with my chickens then, can I? They are all hens. So sad, I guess I'll have to rehome.

 

[Orca5094]

Yeah, unfortunately they will be dangerous to your hens come breeding season. :/

 

[kawabungadude]

Unless you separate them during mating season?