Identify This Duckling ! Please :)

[beginner14]

I was told the duck I got was a brown Pekin but there's no such thing (lol) or at least i don't think so. Right now "she" (hopefully) is about 5 weeks old I believe... And we also have a Pekin the same age who is now about 3 times her size !! So she's very small....

Please help me identify my 5 week old duckling "dark wing" )) thank you all !!!

 

[Ravynscroft]

Buff Orpington, maybe?

 

[krispiescritter]

I have two that are just like yours I think. Any luck figuring out what they are? I'm also having trouble identifying them.