I have 2 pekins that are one week old today. I have been added 1 tbs of nutritional yeast to each cup of food given. I bought brewers yeast at the store yesterday and will start using this soon. Both of my girls seem to be run and scamper when I am in their space or they are trying to escape, however, one of my girls seem to teeter a bit and then lay down. I am not sure if she has weak legs or if I am just so paranoid after watching a video of two awful cases of niacin deficiency on YouTube. Should I use water tablets instead? Is there anything else I can give them for better niacin intake? This is my first go at chicks and ducks!