Although the lifespan of chickens varies, there are several factors that affect it. On average, chickens can live for 5 to 10 years, although some chickens have been known to live for longer. The lifespan of a chicken can be affected by various factors such as their breed, living conditions, diet, and healthcare. For example, free-range chickens that are allowed to roam and forage may live longer than chickens kept in confinement. Similarly, chickens that are well-fed and receive regular veterinary care are likely to live longer than chickens that are malnourished or neglected.