Ok, so Cleo should eat? What kidney food does she have?
Filou did not want to touch the Hill's k/d but he loves his Royal Canin Renal. It exists wet in pouches AND dry - and Filou and Tigris (who is not ill) love these kibbles so much I can use them for treats as well. So I certainly would try all the diet foods I could find.

You may also use rice to dilute the protein in normal food.

I think if she is really feeling bad then more subQs would be the way to go. Look at Puddy or others- sometimes a week with 3 subQ sessions will make sure she does better and then you may go back to weekly.

The best website for sure is
http://www.felinecrf.com/

You can see there also that the levels do not say everything about how a cat feels or how it all will develop.

Filou sends headbumpies to Cleo and says he wants to stay longer with his humans too and she shouldn't give up.

{{{{{Hugs}}}}}