My cat was just diagnosed with chronic kidney disease

I need help and advice regarding my 16 year old male A.S.H.He is strictly indoors, and healthy. When I took him for his annual physical the vet. did blood tests. The tests results show he has chronic kidney disease with less than 50% kidney function. He is symptom free,good appetite, still active. The blood test report shows his creatine kinase as high 756 on a scale of 64-440 U/L. His SDMA is 16 on a scale of 0-14 ug/dl.

Everything else is great. His albumin is 3.4, creatinine is 2.0,phosphorous is 3.8, BUN CREATININE ratio is 12.0. All of the results were very good except for the two I mentioned. Considering he is about 80 years old in human years, he has very good results for everything else. The vet. did say he has less than 50% kidney function. The lab report states his "SDMA is increased and his CREATININE is within reference interval which indicates early kidney disease is likely". The report continues to say that early kidney disease have SDMA between 15-20 ug/dl. SDMA results over 20 ug/dl are indicators of more advanced disease.

Right now he is on a prescription diet for kidney disease, and goes back in 6 months for a recheck. How serious is this? I heard this condition gets worse causing death. Is this a fatal disease? Please help. Thanks
Jeff.

Here are two very good web sites with more info about CRF:

http://www.felinecrf.com/

http://www.felinecrf.org/

Members who have experience with CRF will post their experiences. Just be patient as TCS members are all over the world in different time zones Here are some threads with info and tips you may find helpful in the meantime:

http://www.thecatsite.com/t/246980/kidney-disease

http://www.thecatsite.com/t/298391/kidney-disease-and-protein-controversy

http://www.thecatsite.com/t/311218/my-cat-has-early-kidney-disease-need-advice

http://www.thecatsite.com/t/266593/kidney-disease-food

http://www.thecatsite.com/t/286632/18-yr-old-kitty-with-kidney-disease