The life cycle of a chicken begins with an egg inside a hen. After three weeks, the egg hatches into a chick without feathers. Over three months, the chick grows feathers and gets bigger, and when fully grown can lay eggs of its own. However, chickens only live 1-2 years. When first getting chickens, they need to be kept in a warm box and then can be placed outside in a fenced area. Chickens have distinctive body parts like eyes, a beak, and feathers that keep them warm. There are many breeds of chickens that vary in appearance.