Impact of Eggshell Supplementation in Laying Hen Diets on Performance and Eggshell Quality

Abstract

Eggshell supplementation in poultry diets has gained attention as a potential alternative to conventional calcium sources, such as limestone, in enhancing eggshell quality and supporting overall hen performance. This chapter explores the nutritional benefits of incorporating eggshells into the diets of laying hens, focusing on their effects on egg production, laying performance. The methods of processing eggshells— including washing, sterilisation, drying, and grinding—are examined to achieve the optimal particle size for improved digestibility and nutritional value.  Smaller particle sizes are shown to enhance bioavailability and calcium utilisation. Furthermore, the chapter compares the performance of hens receiving eggshell-based calcium to those fed with traditional sources. The potential environmental and economic benefits of using eggshells, which are readily available as waste from various industries, are also discussed. Ultimately, eggshells are shown to be a viable and sustainable calcium source that can effectively substitute limestone in poultry diets.