Yes, niacin sounds like the name I was trying to remember.That’s what i thought, like chicken food didn’t have enough of something for it to be healthy enough for ducks. Isn’t it like niacin or something? Niacin in chickens feed is too low for ducks right?
But if someone provides enough niacin in any way, they can use chicken food as part of what their ducks eat, and not have a problem.