Artificial Silence wrote:

I will probably just go with Hills K/D, which is what my vet
recommended in the first place...

That's what I'm giving my cat, also recently diagnosed with CRF. She
won't touch the canned K/D, but seems quite happy with the dry K/D. Her
vet suggested R/D if she wouldn't eat the K/D, but she won't eat the
canned R/D either. It's important for CRF cats to stay hydrated, and
canned food helps with that, but even the very best food is worthless if
the cat won't eat it.

You mentioned in your first post that one of your concerns with the
Science Diet foods is that they use byproducts in the food. "Byproduct"
just means parts of the animals that we humans usually choose not to
eat, and there really is nothing wrong with byproduct meats. (Some
people would regard the liver, heart, and tongue to be byproducts--I
call them delicacies.) Cats, given a choice, will eat almost all parts
of their prey, including bones, guts, and hair, and they actually need
some nutrients that they get from the parts we would reject. When mine
eat a mouse they've caught themselves (which they prefer to the food I
offer them) the only thing left is the stomach. I don't think you
should have any concerns about the byproducts as long as the nutrient
values and digestibility are good.

--
Kathy - help for new users at http://www.aptalaska.net/~kmorgan/
Good Net Keeping Seal of Approval at http://www.gnksa.org/
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http://home.in.tum.de/~jain/software/oe-quotefix/