Okay, this has just come to my attention. Can anyone explain why there
is a discrepancy between the ingredient list on the bag and the
ingredient list on the website for Science Diet Adult Chicken & Rice Recipe?

From the Hill's website:

Ingredients
Chicken, brewers rice, corn gluten meal, chicken by-product meal, corn
meal, animal fat (preserved with mixed tocopherols and citric acid),
chicken liver flavor, DL- methionine, taurine, preserved with mixed
tocopherols and citric acid, minerals (potassium chloride, calcium
sulfate, salt, ferrous sulfate, zinc oxide, copper sulfate, manganous
oxide, calcium iodate, sodium selenite), rosemary extract, beta
carotene, vitamins (choline chloride, vitamin A supplement, vitamin D3
supplement, vitamin E supplement, L-ascorbyl-2-polyphosphate (a source
of vitamin C), niacin, thiamine mononitrate, calcium pantothenate,
riboflavin, pyridoxine hydrochloride, folic acid, biotin, vitamin B12
supplement).

From the bag (which I bought one week ago):

Chicken, brewers rice, corn gluten meal, chicken by-product meal, corn
meal, animal fat(preserved with BHA, propyl gallate and citric acid),
chicken liver flavour, DL-methionine, taurine, preserved with BHT and
BHA, beta-caroten, minerals (potassium choride, calcium sulfate, salt,
ferrous sulfate, zinc oxide, copper sulfate, manganous oxide, calcium
iodate, sodium, selenite), vitamins (choline chloride, vitamin A
supplement, vitamin D3 supplement, vitamin E supplement, ascorbic acid
(a source of vitamin C), niacin, thiamine, calcium pantothenate,
riboflavin, pyridoxine hydrochloride, folic acid, biotin, vitamin B12
supplement).

So what is the deal with the subtle difference?

--
"Its the bugs that keep it running."
-Joe Canuck