Overweight Duck?

[chickens really]

The two black are Swedish and the White is a Runner.
I feed my Call Ducks, Duck finisher, scratch grains and oat and barley crumble. Plus veggies.
You don't need to supplement niacin at their age. Peas contain niacin.
Cute Ducks!

 

[barnababy]

I ordered some flock raiser and will begin to change up the diet immediately. Would Brewers Yeast help with the niacin? Hopefully it will solve the weird walk my duck has.

Also, anyone know what breed they may be? I think the two black ones are Cayuga because of the green tint that they had a while ago and I think the white one may be some kind of runner.

Thank You All

They look like Cayuga Rouen mixes and a Runner mixed with.... not sure. A Campbell possibly?