Hi, I have 3 Cayuga Ducklings that are almost 2 weeks old. I have one that has gotten on her back twice now and freaks out and thrashes around. When I pick her up and hold her for a few seconds then she seems to come out of it. I gave them quick chic from Murry McMurry Hatchery for the first 3 days as instructed. From what I have read on here they need to have brewers yeast or Niacin. I didn't know I needed to feed them brewers yeast. How much do I put on their food? Do I have to give the brewers yeast to them or will Niacin be enough? Sorry for all the questions! Thank you for any and all help!!!