The answer to this question depends on the context. There are several leading causes of death for cats, each impacting them in different ways:
1. Euthanasia: This is the number one documented cause of death for cats in the U.S., with many cats being euthanized in shelters due to overpopulation and lack of adoption.
2. Feline Leukemia Virus (FeLV): This highly contagious virus is a significant threat to cats, destroying their immune system and leading to various illnesses.
3. Cancer: In senior cats, cancer is a leading cause of death, with uncontrolled cell growth leading to various complications.
4. Chronic Kidney Disease (CKD): This condition, also known as chronic renal failure, affects cats' kidneys, leading to a gradual decline in their health.
5. Heart Disease: Especially in older cats, heart disease can lead to high blood pressure and other complications that ultimately prove fatal.
6. Predation: Domestic cats, especially those roaming outdoors, pose a significant threat to wildlife, including birds and small mammals.
It's important to consider the specific factors impacting a cat's health and mortality. While these are some of the leading causes, other factors like accidents, infections, and inherited conditions can also contribute to a cat's demise.