What breed of duck are these?

[Kpoh]

Hi all! We got these two about 4 weeks ago at our local tractor supply, so I’d say they are about 5 weeks old now. Tractor supply didn’t specify what breed they are, so I’m hoping ya’ll could help me out! Thanks

 

[SilverBirds]

The black is a Cayuga. My best guess for the white duck is a Golden Cascade that's lacking in gold.

 

[KathiQuacks]

The black is a Cayuga. My best guess for the white duck is a Golden Cascade that's lacking in gold.

That’s a thing?
I was thinking Cayuga and either Welsh Harlequin or Splash Swedish, if TSC would even carry that breed.

 

[SilverBirds]

That’s a thing?
I was thinking Cayuga and either Welsh Harlequin or Splash Swedish, if TSC would even carry that breed.

I'm not entirely sure. She doesn't have any of the markings to be a Welsh and I think a splash Swedish would be incredibly rare.

Here's a picture of some Cascades I found on Google that don't have a lot of gold in them.