Help ID my ducklings!

[PrincessofDucks]

We got these 4 at the feed store. Half off because they were growing too quickly.The littlest dark billed one is staying pretty tiny. And the larger dark billed one is quacking now so not Muscovy like my wonderful other ones. I have no clue what they are. Please help!

 

[PrincessofDucks]

More recent pics.

 

[Kathy farms]

It looks like you have on hand Pekin and other mixed breed. Pekin are fast growing so if some seem relatively bigger than the others, though they are of the same age, it could mean that they are all not the same. In a couple of weeks time you'll know for sure what you have on hand.

Nice cute babies by the way.