>Brewer's yeast is an absolute NO for insulinoma ferrets, so that one is a >definite red flag. That is scientific research. brewers yeast? what does it do? I have no ferrets with insulinoma, but just in case, for future reference, I glanced at the two foods I'm feeding mine & the Marshalls has brewers yeast in it. Shannon Sterling, Pandora, & Jasmin [Posted in FML issue 3606]