So my cat is six years old and while getting a biopsy for something else, they discovered this kidney values had gotten worse over just a couple of weeks (they were normal before) they tested him for a UTI but nothing came up and after a week, his values were still high. He's showing no symptoms at all and it's not completely confirmed but the vet is saying he likely has chronic kidney disease. anyone else have experience with this with a young cat? He's around high stage 2, edging on stage 3. again, no symptoms.