Mortality and Welfare in Laying Hen Flocks

Mortality rates in laying hen flocks are a key welfare indicator, with significant variation between systems reflecting underlying welfare differences.

Key Facts

Mortality in conventional cage systems averages 2-4% annually, but can reach 15%+ in free range
Pecking injuries are the leading cause of mortality in cage-free and free range systems
Beak trimming reduces pecking mortality but causes acute and chronic pain
Feather pecking and cannibalism are primarily driven by barren environments and insufficient resources
Flock size affects mortality with larger flocks generally showing higher mortality rates

Welfare Considerations

Mortality is both a welfare outcome in its own right (death represents the ultimate welfare failure for the individual) and an indicator of broader welfare problems in the flock. High mortality from pecking indicates that underlying behavioural needs are unmet. Attempts to reduce mortality through beak trimming address the symptom rather than the cause. Genuine welfare improvement requires environmental enrichment, appropriate stocking density and management that meets hens' behavioural needs, reducing the motivation for redirected aggression.

What You Can Do

Support certification schemes that require beak trimming reduction through environmental improvement
Advocate for flock monitoring requirements identifying welfare problems before mortality escalates
Choose eggs from lower-mortality production systems with confirmed enrichment standards
Support research into effective enrichment and management practices reducing feather pecking