Many factors can influence egg quality and appearance. These factors will vary depending upon the housing environment, genetics, drugs, feed ingredients, or chemicals used in agriculture. As egg production methods become more varied—for example, changing from cage to free range—and as layer strains are selected for the environment and hens age, the number of defects in eggs is increasing. The emphasis on locally produced food in the “slow food movement” also has changed what the hens are exposed to and made the way they are handled increasingly variable. It is important for producers to understand what may cause certain egg defects and to provide a solution in their production system.
“The following chart identifies a number of defects in eggs, their possible causes, and corrective measures you may take.”