Any duck vitamins/supplements?

[Cookiekiller53]

I was just wondering if there's any duck vitamin/supplements out there for my muscovy? i just wanna make sure he's getting the right amount nutrition just for overall health. Also any tricks for keeping their feathers in good shape? And should i trim them a little?

 

[ducksinarow]

I buy poultry electrolytes from Rural King. It comes in a silver foil bag. I also have bought brewers yeast for niacin. My birds don't mind either. I put the electrolytes in water and the yeast in their food.