Rouen Duckling Gender Confusion

[JAPPER]

So I ordered two Rouen ducklings, one male and one female. The male was marked for distinguishing purposes. The problem is the female duckling is growing much faster, and I’ve read that makes are supposed to grow faster. The ducklings are just over a week old. The female is much larger, as I previously stated, being nearly twice his size. Do you think they got the genders correct or accidentally switched them?

 

[Soon2BChixMom]

If you could post pics, we might be able to help. But, they are probably too young at this point to know for sure.
We also have a duck forum here where duck questions are answered quicker.
https://www.backyardchickens.com/forums/ducks.42/

 

[JAPPER]

Here’s a picture of them. The one to the left was marked as a male, and the one to the right was marked female.

 

[JedJackson]

They could have mixed them up but there's no way to know for sure until they are older. They are very cute!

 

[Soon2BChixMom]

They are quite young and if you ordered there is a possibility of a mix up, but your chances are good you got what you wanted.

 

[JAPPER]

Okay, thanks a ton for your help!