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Related Experiment Video

Updated: Jun 20, 2026

Windowing Chicken Eggs for Developmental Studies

Windowing Chicken Eggs for Developmental Studies

Published on: October 1, 2007

Perch width preferences of laying hens.

E Struelens¹, F A M Tuyttens, B Ampe

¹Animal Sciences, Institute for Agricultural and Fisheries Research, Melle, Belgium. ester.struelens@hogent.be

British Poultry Science

|September 8, 2009

Summary

Narrow perches (1.5 cm) are not recommended for laying hens. Wider perches show varied usage, with 4.5 cm perches being a common, acceptable width.

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Area of Science:

Animal Behavior
Avian Science
Animal Welfare

Background:

Perching is a natural behavior for laying hens.
Perch design, specifically width, may influence perching behavior and welfare.

Purpose of the Study:

To investigate the effect of different perch widths on the perching behavior of laying hens.
To determine optimal perch widths for laying hen welfare and behavior.

Main Methods:

Two experiments (EXP-2P and EXP-7P) were conducted using 7 perch widths (1.5-10.5 cm).
Laying hens (groups of 4) were filmed day and night, with behavior and location recorded.
The influence of nest box proximity on perch distribution was also examined.

Main Results:

During daytime, hens preferred wider perches, with significantly less use of 1.5 cm perches.
Perch use did not increase linearly with width in one experiment, and no significant width preferences were observed at night.
Active and passive behaviors did not differ significantly across perch widths.

Conclusions:

A perch width of 1.5 cm is not suitable for laying hens.
Results for wider perches are equivocal, but suggest that 4.5 cm perches are widely acceptable and do not need to be challenged.