Nutritional yeast is a better supplement than Brewers yeast it has more niacin and that is the important nutrient that waterfowl need when they are being fed feed for chickens. Which many of us have to use because that’s all we can get. If one is already showing signs of neurological or leg problems though we have found liquid B Complex works better and faster. It can be found at TSC in the cattle dept or at local store that sells human vitamins either can be used.