The animal tissue derived protein and fat levels in dog food are too low for most ferrets, and very important is that the taurine level is too low. Low taurine is shown to cause eye damage in ferrets and there are indications that like in cats it might also cause cardiomyopathy. Sukie (not a vet) Current FHL address: http://groups.yahoo.com/group/ferrethealth People can join there or can send a blank mail to the automated joining address: [log in to unmask] and then follow the directions. (The second is recommended for those having problems with Yahoogroups web settings, and afterward send a blank mail from your subscribed address to [log in to unmask] to get the digest instead of individual mails. ) Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/fhc/ http://www.ferretcongress.org/ [Posted in FML 5484]