Improved understanding of the factors that affect the
performance and quality of the eggshells produced by
commercial laying hens is essential for the production
of the highest quality eggs because defects in shell quality
can cause significant losses to the commercial egg
industry. Between 10 and 15% of laying eggs are lost
before and during the collection process due to problems
related to the shell quality (Roland, 1988; Coutts
et al., 2007). Therefore, different strategies, especially
mineral nutrition and supplementation, have been considered
to improve eggshell quality