One of my Ancona ducks isn't doing good. She turns her left foot back to walk and prefers not to walk. She sorta looks like she's limping it. After having it looked up, I think it's because of niacin defiency. We always just used chick starter which now I learned needs to have niacin added to it for ducks. But I didn't know that or did that. We're going to get some niacin, but is there anything I can do? None of the other ducks have it, which apparently is normal. Should I add niacin to the ducks that are fine and don't seem to have this food, too? Anything else I need to know about this? Thanks guys! Splish, the duck thanks you too!