Jennifer writes >Brewer's Yeast: good source of protein and Chromium, which regulates >blood sugar levels, and is one of the best natural sources of several >B-complex vitamins. Chromium LOWERS blood sugar--since diabetes is a bigger problem than low blood sugar in humans, cats and dogs, this is a good thing. But Chromium will lower the blood sugar even if it is already normal or low, so this is a bad thing for ferrets with insulinoma. I don't believe it is known however if the amounts present in brewers yeast is enough to have a real effect. But I'd recommend avoiding it. Linda International Ferret Congress http://www.ferretcongress.org [Posted in FML issue 4747]