Animals eat in order to get the energy and nutrients they need to live, grow and reproduce. Animals use energy to perform normal body functions such as breathing, walking, eating, digesting, and maintaining body temperature. Different types of nutrients provide energy as well as the building blocks needed for the development of bone, flesh, feathers, and eggs. These nutrients include: water, carbohydrates, fats, proteins, minerals, and vitamins. Each of these components is important and a deficit of even one can have serious health consequences for poultry.