Levels of Mortality in Laying Hens

Implications for Welfare, Productivity and
Sustainability of the Variation in Reported
Levels of Mortality for Laying Hen Flocks Kept
in Different Housing Systems: A Meta-
Analysis of Ten Studies ...

Data from ten sources comprising 3,851 flocks were modelled to identify variation in levels
of mortality in laying hens. The predicted increase with age was curvilinear with significant variation between the seven breed categories. Mortality was higher in loose housing systems than in cages and variable within system, confirming previous reports.

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