CAT HEALTH HELP. UTI. MICROALBUMINURIA.?

Hard to say what's going on. That may be why your vet doesn't have answers. The high levels of protein and albumin can be due to dehydration, which might be due to whatever the real issue is. If kitty's not feeling well she might not be drinking enough. Low levels of platelets can sometimes indicate leukemia, lymphoma, or even an infection. I also wanted to note that using low protein diets for kidney issues is a little old school. Many cats on these diets long term will just kind of slowly waste away. Many vets now reserve these diets for end stage renal failure. Something you may want to do your own research on and ask your vet about.