Water is the most critical, but also the most overlooked, nutrient when it comes to flock performance in the poultry industry. A bird can survive for weeks without feed but only for a few days if water is not available. Water is essential for many functions within the body, such as moving feed through the digestive tract and carrying nutrients (vitamins, minerals, amino acids, and so forth) throughout the body. Water is also needed for the many enzymatic and chemical reactions in the body, body temperature regulation, lubrication of joints and organs, and excretion of waste products from the body.