My neutered male cat, Snowball, will be 12 years old this September. In September 2001, a blood test showed that Snowball's creatinine level was slightly elevated, and the vet thought he had early kidney disease. Since then, Snowball has been on a strict diet of K/D dry food, and blood tests done every six months have shown that his kidney function is within normal. So far, no other health problems have been diagnosed. My question is, can a special diet keep kidney disease from progressing indefinitely?