Hi all, It has finally happened to me. I have a duckling that I am sure is suffering from a niacin deficiency. She has all the symptoms. I live in a small town and the right feed is sometimes hard to find. I am feeding the ducklings Flock Raiser, which has the right amount of protein in it for them, but no niacin or very little. I have been adding Nutri-Drench to their drinking water for vitamins, niacin, etc. However, I don't think there is enough niacin in it for this girl. I went out at 8:30 last night to our three stores (Walgreen's, Wal-mart, and Safeway) to find non "non-flush" niacin, and could not find any. I did find the Poly VI Sol, and administered half of the recommended dose for human babies to her, that would be .5mL. A full dose of niacin in this product is 8mg for 1mL. Call me crazy, but she seems to be walking better this morning. I want to give her another doze but I am not sure how much or how often I should. Keeping in mind that they have Nutri-Drench in their drinking water how much Poly Vi Sol should I give her, and how often. I don't want her to overdose on vitamins. In the meantime, I did order the poult pak from Metzer Farms. Hopefully, it will be here soon. Once I receive it I will stop using the Nutri-Drench and Poly Vi Sol. I used it with my last ducklings and they were all well. I simply forgot to order it this go round. UPDATE: The Poly Vi Sol is working. The ducking has greatly improved.