average age of cats
The life expectancy of a cat is typically 12â15 years. However, some cats may attain the age of 21 years or more.By comparison, the average life expectancy of humans in the United States at birth in 2014 was 79.56 years. A one-year-old cat is roughly comparable, in developmental terms, to a 15-year-old-human.owever, some cats may attain the age of 21 years or more. By comparison, the average life expectancy of humans in the United States at birth in 2014 was 79.56 years.