Did you offer her the different diets as a smorgasbord- putting them all out
at the same time and letting her choose her favorite?

Try offering the loaf diet again, alone.  But this time, cut it up into
small chunks with a knife- don't mush it.

If budget isn't issue, I'd recommend Fancy Feast over Friskies because it
contains more meat products and more protein from animal tissue than
Friskies.

The caloric content of two 3 oz cans of FF is about the same as one 5.5 oz
can of most premium brands- which is about the same as the daily caloric
requirement for most cats.  With 3 oz cans, you can feed a freshly opened
can at both feedings; with 5.5 oz cans you must refrigerate 1/2 the can and
reheat it before serving.  Sometimes the cooling and reheating affects
flavor and texture.

You could try to accustom her taste and smell to SD by putting a dab of SD
on her nose.  The odor will satiate her olfactory system and when she licks
it off, she'll satiate her gustatory system so she won't detect the SD in
the mix until after she's eaten it.  Then gradually increase the amount of
SD in the mix while simultaneously decreasing the amount of Friskies by the
same amount.  I found also smearing a little food on a cat's belly helps her
get accustomed to a different food.

I've learned that feeding a variety of foods at a young age will often avoid
fixed food preferences later in life.  This is very important if the cat
develops a condition that requires a prescription food.  I try to accustom
cats to low phosphorus diets early on because that seems to be the hardest
addiction for cats to break.

Keep the faith- and keep trying!

Good luck,

Phil

This is only anecdotal evidence, but my cat is around 15 years old.
Other than a minor thyroid problem, my cat is healthy on the food I
provide for her. My cat visits the vet for a check up with full blood
work roughly every six months, so I now of what I speak.  My cat is fed
roughly about 75% dry food and 25% canned. I buy whatever's cheapest,
but I buy her Whiskas if the price is not much different than the
cheapest food.

I think those expensive high end pet foods are all marketing and no
substance. I am 43 and I have had cats for pets as long as I can
remember. My parents fed one of their cats Science Diet canned food
exclusively. Its longevity was no better than our cats who are fed the
bargain priced cat food. Of course, if you feel better by spending more
money on premium cat food, more power to you.

I mean food for fish that comes in flake form (as opposed to floating
pellets).  It is made out of dried fish products.  I just put a pinch or two
on top of the cat's food, about the same amount I fed the fish.

I'm sure your cat would also like fresh fish or canned tuna but that is
definitely not less expensive.  The most nutritious food I know of is raw
beef or poultry but as a vegetarian, you may not want to deal with that just
for kitty.

You can also supplement your cat's regular diet with vitamins (liquid or in
the form of treats) or if your cat is outdoors, he is likely supplementing
his own diet with bugs and an occasional mouse or bird.

Mostly I just stay away from foods with high non-nutritious filler content
(ash, bone meal etc) which is mainly used by the cheapest brands.

Also if you are looking to save $ on pet food, buy at the big pet chain
stores instead of the supermarket and you will save quite a bit.  If the
regular brands were all that bad, people would stop buying them.  For the
most part they are quite adequate for the pets.  The premium brands, though
they do in fact contain more nutritious and pure ingredients may exceed the
dietary requirements of most pets.  They are good products but overkill
IMHO.   Though, particularly for indoor cats, you may also notice a
difference on the odor from the litter box, which may be worth the extra
expense right there.