Hi guys I have 2, 3 week old call ducklings and they are on duck starter with extra Brewers yeast. I think the Brewers yeast is making them sneeze( they only sneeze occasionally but when they do they sneeze about 4 times in a row) and breath heavily( they might be wheezing but I don't know what a wheezing duck sounds like ) I am wetting their food with Brewers yeast on to try and keep the dust down. What can I do ?or will the sneezing, heavy breathing stop at ten week when they come of the Brewers yeast? Thanks in advance