It doesn't look like Pitambar received a urinalysis. This test needs to be run to help stage the renal disease or if dehydration is present and causing the increase in the renal values. Talk with your veterinarian about having this test run asap:
https://www.petcoach.co/article/urinalysis-testing-a-urine-sample/There is another test called an SDMA which will help stage renal disease:
https://www.idexx.com/en/veterinary/reference-laboratories/sdma/Pitambar should also have a urine protein:creatine ratio run to check for protein loss and the need to medication to control that if it is present.
This website discusses how renal disease is staged:
https://www.idexx.com/en/veterinary/reference-laboratories/sdma/sdma-iris/Kidney disease is serious and if caught early, many pets will respond to easy treatment and this will not only slow down disease process but will also increase the life expectancy. Often the first step is changing the diet to a prescription diet meant for pets who have kidney disease. These diets have lower protein, phosphorus and high amounts of omega 3 fatty acids, higher amounts of antioxidants and have a higher calorie amount. Supplementing with an additional omega 3 fatty acid can also help. Pitambar will need followup bloodwork and a urinalysis 4-6 weeks after starting treatment. As things progress, other treatments will be needed.
https://www.petcoach.co/article/kidney-disease-causes-signs-diagnosis-and-treatment/I hope this helps and please feel free to post any additional questions.