The lifespan of a chicken can vary depending on several factors, including breed, care, and nutrition. Here are some key points from the search results:

• The average lifespan of a chicken is about 5-10 years, but this can vary depending on the breed.
• Different breeds of chickens have different average lifespans. For example, Isa Browns have an average lifespan of 2-3 years, while Plymouth Rocks can live up to 8-10 years.
• Heritage or landrace chicken breeds tend to have longer lifespans than chicken breeds bred for egg or meat production.
• Chickens bred for egg or meat production tend to have shorter lifespans than heritage or landrace breeds.
• A chickens productive lifespan, which is the amount of time it is at peak egg production, is typically around 2-3 years.
• In general, most wild chicken breeds can live between three and seven years, and sometimes longer.
• A domestic chicken can live up to 15 years if it is well kept, but in intensive animal husbandry, chickens are among the farm animals with the shortest lifespan of all.

In summary, the lifespan of a chicken can vary depending on several factors, but the average lifespan is about 5-10 years. Heritage or landrace breeds tend to have longer lifespans than chicken breeds bred for egg or meat production, and a chickens productive lifespan is typically around 2-3 years.