One of my co-workers has two cats, and I think they have a different food
for every meal.  She must have tried every kind on the market, from the
cheapest supermarket foods to expensive brands.  Every time I go to the pet
store to get supplies and ask her if she needs anything, she's got a new
request.  One or the other of her cats all of a sudden won't eat that brand,
or so she says.

I've been feeding my two cats Science Diet canned & dry for several years.
Before SD, they've had Wellness, Nutro, Petguard, Iams and a few other
brands.  I never really mixed up brands, usually went from one right to
another.  They have always eaten whatever I gave them and never even seemed
to notice it was different.  I have two cats at work and they have also
eaten SD canned & dry exclusively for several years.  They're both on the
Light formula.  They have also had different foods in the past and were
always happy to eat new dry food, but could be picky about the wet stuff.
Harriet doesn't like any wet food much at all, and Stinky really seems to
prefer the SD Light over every other kind I've tried.  Once last year I gave
her a small can of something else, and both Stinky & Hariet loved it, but I
don't remember what it was, or why I even bought it.  I know it wasn't a
light formula, otherwise I probably would have gotten more for them since
Harriet ate it.

Liz