According to an article appearing in the November 2000 issue of Catnip, a magazine for caring cat owners published by Tufts University of Veterinary Medicine, your cat will age 42 human years in its first 3 cat years. At 1 cat year it is already 24 human years old. After it turns 42 on its 3rd birthday, it will age approximately 3 human years for every 1 cat year.
You can subscribe to Catnip by calling Subscription Services at 800-829-0926 or e-mail them at catnip@palmcoastd.com. The November issue includes articles on Lymphoma, a cat's spine, the Turkish Van, making your home "escape-proof," and hi-tech litter boxes.