Muscovy Duckling colouring

[Lol123]

Can anyone help with what colour this little dude might be? Its 3 weeks old

 

[Jenbirdee]

I think white with black like the one in the top right of your pic
the ducklings foot looks turned in
are you adding supplemental niacin ( like nutritional yeast 1.5 Tbsp to each cup of feed she gets>) ?