Livestock

Hen Nesting Behaviour: A Fundamental Welfare Need

The drive to nest before laying is one of the strongest behavioural motivations in laying hens, and thwarting it causes significant welfare harm in cage systems.

Key Facts

Hens show increasing restlessness for 1-2 hours before laying, seeking a nest site
Hens deprived of nest access show signs of acute frustration
In cage systems, the nesting drive cannot be expressed, causing chronic stress
Nest boxes in enriched systems reduce but do not eliminate nesting frustration
The five freedoms explicitly include freedom to express normal behaviour

Welfare Considerations

Nesting motivation is among the most robust behavioural drives measured in poultry welfare science. Hens prevented from nesting show elevated stress hormones and persistent, repetitive search behaviour. Deprivation studies demonstrate that hens will work harder to access a nest box than to access food after a period of deprivation. Cage systems that deny nesting cause welfare harm provably equivalent to pain in terms of motivational intensity.

What You Can Do

Buy only free-range or barn eggs where nesting opportunities exist
Advocate for enriched cage standards that include adequate nesting provision
Support campaigns to end conventional battery cage use globally
Engage with retailers and food service businesses about their egg sourcing standards
Share evidence on nesting motivation as a compelling welfare argument