cats.about.com "What Is the Life Span of the Common Cat?" "What Is the Life Span of the Common Cat?" What is the life span of the common cat? average indoor cat will live between 12-15 years About Home "What Is the Life Span of the Common Cat?" the longest-lived cat on earth "What Is the Life Span of the Common Cat?" about.com «What Is the Life Span of the Common Cat?» "What Is the Life Span of the Common Cat?" 12 to 15 years old the longest-lived cat on earth