Although your cat is no longer the spry youngster that it once was, senior cat diets are not for all senior cats. Before you decide to switch your cat from the adult cat food that it's accustomed to eating, you should think about more than just her chronological age.
The Special Needs of the Senior Cat
Just as people are living longer than they did in the past, cats are living longer too. In fact, the percentage of cats over six years of age has nearly doubled in just over a decade, and there is every reason to expect that the "graying" cat population will continue to grow.
So how old is my cat, really?
Cats are individuals and, like people, they experience advancing years in their own unique ways. Many cats begin to encounter age-related physical changes between seven and ten years of age, and most do so by the time they are 12. The commonly held belief that every "cat year" is worth seven "human years" is not entirely accurate. In reality, a one-year-old cat is physiologically similar to a 16-year-old human, and a two-year-old cat is like a person of 21. For every year thereafter, each cat year is worth about four human years. Using this formula, a ten-year-old cat is similar age wise to a 53-year-old person, a 12-year-old cat to a 61-year-old person, and a 15-year-old cat to a person of 73.