Nest Boxes for Laying Hens: Meeting the Pre-Laying Behavior Drive

The motivation to lay eggs in a secluded nest is one of the strongest behavioral drives in laying hens. Systems that frustrate this drive cause significant welfare harm to billions of hens globally.

Key Facts

The pre-laying behavior sequence in hens includes searching for a suitable nest site for up to 2 hours
Hens in cage systems that cannot access nest boxes show signs of intense frustration during pre-laying
Nest boxes should provide visual isolation, appropriate dimensions, and suitable nesting material
Colony and cage-free systems provide nest boxes but access may be inadequate if ratio to hens is low
One nest box for every 5-7 hens is typically recommended, though preferences vary
AstroTurf or artificial turf nest linings are preferred by hens over wire or bare plastic surfaces
Hens show strong nesting site fidelity, returning to the same nest repeatedly if access is available
Floor laying (laying outside nest boxes) indicates inadequate nest provision or accessibility problems

Welfare Considerations

Pre-laying motivation in hens is an instinctive drive so strong that its frustration causes behavioral and physiological stress equivalent to other significant welfare insults. A hen that cannot find a suitable nest site after extended searching exhibits clear signs of distress - repeated unproductive searching, escape attempts, and distress calls. In cage systems where nest boxes are absent, this frustration is experienced by every hen, every day, for their entire productive life. Providing appropriate, accessible nest boxes addresses this core welfare need. The importance of nest design details - visual privacy, surface material, appropriate dimensions - reflects how specifically this behavioral drive is tuned to specific environmental features.

What You Can Do

Choose eggs from cage-free, free-range, or barn systems that provide accessible nest boxes
Advocate for nest box requirements in all laying hen welfare standards including minimum ratios
Support regulatory development of nest box quality requirements beyond mere provision
Engage retailers about specific nest box standards required from their egg suppliers
Learn about pre-laying behavior in hens to understand why nest provision is a welfare necessity
Support research into optimal nest box design that best satisfies hens' pre-laying behavioral needs