What mineral do chicken eggs need to form properly?

Chicken eggs require calcium to form properly because it is a crucial component of the eggshell. The eggshell itself is composed primarily of calcium carbonate. Adequate calcium in the hen's diet ensures that she can produce strong, healthy eggshells that protect the developing embryo inside. If a hen does not receive enough calcium, the eggshell may be weak or thin, leading to increased breakage and reduced hatchability.

In contrast, while iron, magnesium, and potassium are important minerals for overall chicken health and production, they do not play a direct role in the formation of the eggshell itself. Iron is mainly involved in oxygen transport in the body, magnesium is required for various metabolic processes, and potassium is crucial for maintaining fluid balance and nerve function. However, none of these minerals contributes to the structural integrity of the eggshell as calcium does.