What is the life expectancy of a hen?

What is the life expectancy of a hen?

Battery hens are usually destroyed after one years of being just an egg laying machine. With good care some hens are still just about laying at ten years old and can live for up to 17 year. Jupiter, the last remaining hen of a small flock all named after planets, was already twelve and looked amazingly healthy, when her owner wrote to me. She wandered in the garden, roosts in an outhouse but her greatest desire was to be in the house and lie in front of the fire.