Cat lifespan varies from breed to breed; however, the average lifespan of a free-roaming cat is less than 3 years, whereas the lifespan of an indoor cat averages 15 to 18 years. Spayed and neutered cats live longer because they do not develop ovarian or testicular cancers.
Cats and humans age differently but the typical 1-year old cat is equivalent to a 16 to 17-year old teenager. Between the ages of 1 and 9, each year equates to 5 to 6 years in humans. A 25-year age cat is 108 years old in human terms.
Indoor cats live longer than their outdoor counterparts because they do not face the dangers that outdoor cats face: traffic, attacks from other animals, feral diseases and stress. They normally enjoy a better diet, lifestyle and veterinarian care. Mixed breed cats usually live longer than purebreds since their genetic makeup usually shields them from hereditary diseases.
Diet and exercise is important for a healthy cat. Obesity can result in diabetes, heart and liver diseases, breathing difficulties and arthritis. Regular visits to the veterinarian will ensure a long live by catching any health problems before they become serious.