I need to know the genders on my 2 Khaki Campbells

[2cool4school]

I originally thought they were female based on plummage, then I read some where that the plumage is the same until they're about 12 weeks for Rouens and Khaki Campbells. 1 is 5-10% larger and still has a chick chirp, the other one that's a little bit smaller has a female quack. They're both about 6-7 weeks old,

https://imgur.com/a/DmP6Urv

 

[Supercow]

In principle the guys get their adult voice later but girls do around four weeks so not quacking at 6-7 weeks probably means no quacking later on either because it's a boy. On the other hand we've had girls with nothing to say until they were suddenly alone. Try putting your no-quack one somewhere separate and see what happens.

 

[2cool4school]

In principle the guys get their adult voice later but girls do around four weeks so not quacking at 6-7 weeks probably means no quacking later on either because it's a boy. On the other hand we've had girls with nothing to say until they were suddenly alone. Try putting your no-quack one somewhere separate and see what happens.

I'll try that, they literally look identical besides size. There's no sign of the bigger ones head turning black. I'll try putting it by itself, the problem is that I've heard its voice. It's a chirp with (maybe my imagination) a tiny raspyness to it.

 

[cheezenkwackers]

The one on the right in the second picture is a drake. You can tell by the dark feathers above his tail and the color of his bill. The one on the left is difficult to tell but if she is quacking then she is a she. In the picture below, my drake is on the right and my hen is on the left.

 

[Papaye]

Hi.

On your three pictures :
• the KC duckling on the left is a girl;
• the KC duckling on the right is a boy.

At least, it looks like it to me!

 

[2cool4school]

Hi.

On your three pictures :
• the KC duckling on the left is a girl;
• the KC duckling on the right is a boy.

At least, it looks like it to me!

That's what I'm starting to think