How To Determine Cat Age. The best way to tell the age of a cat is by looking at the pussy's teeth. The cat is mature physically and behaviourally, and is still usually healthy and active, looking sleek and shiny and making the best of life;
Look at their teeth teeth are a fantastic indicator of a cat's age. This cat developed her paunch around 2 years old. An indoor cat will age approximately 4 human years for every one cat year, and an outdoor cat will age approximately 8 human years for every one cat.