Gary, Re: your question on a place selling corn based food and corn treats
and saying they are for ferrets: There is a section in James Fox's _Biology
and Diseases of the Ferret_ vet text mentioning yellow corn meal as a known
cause of bladder stones.  It raises the pH letting the minerals crystalize
out.  How much is too much?  I don't know.  We aren't wild about the stuff
since bladder debris is painful for them and can be dangerous.
[Posted in FML issue 3264]