Nutritional Strategies for Enhancing Laying Hen Production and Egg Quality

The purpose of this chapter is to translate contemporary evidence on layer nutrition into practical, defensible guidance that can be applied across housing systems and extended laying cycles. Optimizing the daily intake of available nutrients per hen – rather than relying solely on dietary percentages in feed – is the most efficient way to sustain high hen-day production, maintain eggshell integrity, and preserve internal quality across extended laying cycles. This chapter summarizes current research on energy density and lipids (with emphasis on linoleic acid), amino acids (standardized ileal digestible; SID) associated with egg mass targets, and the shell–bone metabolism (calcium, phosphorus, vitamin D and its metabolites, and limestone particle size). Along with the evaluation of feed form, particle size strategies, time-of-day (split) feeding, and water quality (pH, TDS, and salinity), and review functional feed additives (phytase, carbohydrases, protease blends, probiotics/prebiotics/organic acids, phytogenics, and carotenoids). Where literature is heterogeneous (e.g., xylanase, protease, essential oils, organic trace minerals, vitamin D metabolites), this presents both positive findings and null results to guide risk-aware adoption. Practical considerations and utilization of alternative ingredients are highlighted in late-cycle adjustments within the constraints of sustainability. The most repeatable wins are: (i) hitting daily SID amino-acid intakes appropriate for the desired egg mass, (ii) managing calcium intake associated with coarse particle supply resulting in Ca later in the day, (iii) default use of phytase for sustainable phosphorus management, and (iv) routine monitoring and correction of water quality.