Ty, what you read, was it probably in regards to mercury, and or small bones from fish, and or pointy bits from shells and limbs of shellfish/crustaceans?
None of the above, mercury etc. is all a hoax. This is what I read:-
http://www.beyondveg.com/tu-j-l/raw-cooked/raw-cooked-1h.shtml"Raw fish blocks thiamine absorption in cats. As an aside, it is known that raw fish contains an enzyme, thiaminase, which blocks thiamine absorption in cats. Thiamine deficiencies may occur if cats are fed raw fish in excess, so we find here a benefit in destroying enzymes by cooking if cats are fed this food. (This point is an issue primarily of academic interest, of course, since fish were an insignificant part of the natural diet of the wild African ancestors of today's domestic housecats.)"
This may be b*ll, though, as I have heard anecdotal accounts of a cat on a years-long round the world trip who lived off raw fish, primarily, without issues.
The other argument re pottenger is bogus since it suggests that cooked/processed cat-food supplements are fine as long as synthetic amounts of taurine are added.
