Hen Nesting Behaviour Welfare | Animal Welfare Hub

The nesting behaviour of laying hens is a highly motivated behaviour whose frustration in cage systems causes measurable distress that has driven reforms in housing standards.

Key Facts

Hens perform a 2-hour pre-laying sequence including searching, entering, and settling in a nest
Hens deprived of nesting material show redirected nesting behaviour and elevated stress hormones
The nest box in enriched cages provides partial but incomplete satisfaction of nesting motivation
Free-range and barn systems provide more opportunity for nesting behaviour expression
Nest preference research informs nest box design to maximise natural behaviour expression

Welfare Considerations

Hen nesting behaviour welfare was instrumental in demonstrating that physical health is not sufficient for good welfare — a hen in a battery cage that was physically healthy but unable to lay in a nest was nonetheless welfare-compromised. The pre-laying behavioural sequence is strongly motivated: hens denied nesting opportunity show escalating frustration behaviour, stress responses, and eventually lay their egg without completing the sequence in a state of welfare compromise. This evidence was part of the scientific case that led to the EU ban on barren battery cages. Nest box provision is a welfare improvement, but the motivation for nesting behaviour requires more than a curtained box in a colony system to be fully satisfied.

What You Can Do

Choose eggs from systems that provide genuine nesting opportunity for hens
Support welfare standards requiring evidence-based nest box design and space
Advocate for housing systems that allow hens to complete natural pre-laying behaviour
Follow nest behaviour welfare research from Bristol University and Edinburgh's Roslin Institute