Laying Hen Nest Box Use and Pre-Lay Behaviour

The pre-lay period is one of the most welfare-significant phases of a laying hen's day. Nest box availability and design directly affect whether hens can satisfy their strong nesting motivation.

Key Facts

Hens show nest-seeking behaviour for 1-2 hours before laying an egg
In the absence of nest boxes, hens show visible distress and frustrated pacing
Disrupted nesting attempts are associated with elevated corticosterone stress hormones
RSPCA Assured standards require at least one nest box per 7 birds
Furnished cages include nest boxes but space per bird is still very limited
Free-range hens with adequate nest boxes show significantly reduced pre-lay stress

Welfare Considerations

Pre-lay stress is one of the clearest welfare indicators available in laying hen systems. The frustration of nesting motivation in caged systems is measurable and severe. Hens show motivation to find a private, sheltered, dark space before laying that is as strong as hunger motivation in feed-deprived birds. Systems that deny this opportunity create repeated daily welfare harm - for every egg laid in a suboptimal system, a hen has experienced acute frustration. Nest box provision and design is a low-cost, high-impact welfare intervention that directly addresses a fundamental hen need.

What You Can Do

Choose free-range or barn eggs with RSPCA Assured certification
Ask egg producers about nest box provision ratios and design
Support campaigns to eliminate all cage systems for laying hens
Back research into optimal nest box design for different hen breeds
Advocate for nest box provision standards to be included in all welfare legislation