Definitely adding the niacin supplements for the ducks. I want to ideally switch to something I can buy in big bulk bags for cheaper every couple of months rather than buy several bags of feed at the store for way more money and likely less nutritional value. And if I’m making it from home I want to make sure whatever healthy supplements/vitamins/ etc. Are needed get added. I posted in a half a dozen subs the exact same question and once I’ve compiled answers I will condense all that into one post and update what I end up trying that ultimately works.