The necessity of supplementing laying hen diets with linoleic acid

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Abstract
Results from four experiments with laying hens have been re‐examined using the means of individual 28‐d periods during egg production to investigate the influence of the developing ovary and linoleate storage during growth on the linoleic acid requirement of the laying hen. Apart from a possible beneficial effect during the first few weeks of production, little increase in egg weight occurs when birds are fed on conventional rearing diets and then fed on laying diets containing linoleic acid in excess of requirement. After depletion of linoleate reserves, dietary supplementation with linoleic acid significantly increases egg weight at any age. The necessity of supplementing diets for laying hens with linoleic acid is discussed.