What breed?

[CityFarm777]

Does anyone know what my ducks breed and genders are? Bought from TSC but cant tell if rouen or mallards, but i have one dark bill and the other 2 are yellowish brown?

 

[CityFarm777]

Here is another pic of them

 

[Ashleymarie529]

Here is another pic of them

I'd say Rouen because of the second stripe under the eye

 

[Happy Quack]

I would say Rouens too. They are to young to tell gender from a pic. You can tell from their voice though. A hen will have a louder quack or the beginning of a quack. A drakes voice will be raspy and low. After they feather out all the way they will go through a molt. That is when (if they are drakes) they will get curly sex feathers on their tails.