This captivating book delves into the complex process of eggshell formation in laying hens. With contributions from leading experts, it explores the physiological processes, regulation mechanisms, and age-related changes affecting eggshell quality. From the biomineralization process to the dynamics of calcium stores, from nutritional measures to welfare challenges, and the pivotal role of vitamin D, this comprehensive guide equips the reader with the knowledge to maintain high-quality eggs throughout the laying cycle. Solanum glaucophyllum is introduced as a plant offering a unique solution for supporting eggshell formation in laying hens.