We do not know what to feed Coco because her bladder and kidney problems

She has been on urinary food for 2 years because she gets alot of crystals and infections.
The problem is she has Kidney problems now.
The vet said they need to try to get her on kidney food but the bladder problem will come back.
She has a E coli infection right now.

How about feeding the kidney friendly food plus an acidifier to prevent crystals??

Do you monitor Coco's urine pH? I've never used an acidifier but if I did I would want to periodically test her urine because you can go too acidic. I "treat" Jeta's struvite problem with diet (raw food) and I monitor her pH to make sure it is acidic enough.

Of course I'm assuming Coco's problem is with struvite crystals and not oxalate crystals.

i do not know if it crystals this time.
She has a E coli infection now again.
The vet called back and we will see him friday instead of next week.
Coco's crystals are Struvite and so were her bladder stones two years ago.
The S/D got rid of the stones.
I do not have any test stripes to test her urine.
She will ahve a test on friday again.