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Assessing Whole-Body Lipid-Handling Capacity in Mice

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Litter lipid content affects dustbathing behavior in laying hens.

B Scholz¹, J B Kjaer, S Urselmans

¹Institute of Animal Welfare and Animal Husbandry, Friedrich-Loeffler-Institut, Celle, Germany. britta.scholz@fli.bund.de

Poultry Science

|October 20, 2011

Summary

The study found that laying hens preferred dustbathing materials with lower lipid content. Food particles, commonly used as litter, may not be ideal for dustbathing due to their lipid levels.

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Area of Science:

Animal Science
Ethology
Poultry Husbandry

Background:

EU regulations mandate dustbathing material for layer hens from 2012.
Food particles are common litter in cage systems, but their lipid content may impact dustbathing adequacy.
Dustbathing is crucial for hens to remove lipids from plumage.

Purpose of the Study:

To analyze dustbathing behavior in laying hens as influenced by the lipid content of feed used as litter material.
To determine the suitability of food particles with varying lipid levels as dustbathing substrates.

Main Methods:

72 laying hens of two genotypes were housed in compartments with different dustbathing trays.
Trays contained low-lipid (0.82%), normal-lipid (4.2%), and high-lipid (15.7%) food particles.
Video recordings analyzed dustbathing frequency, duration, and related behaviors over several weeks.

Main Results:

Hens showed a preference for low-lipid (L) dustbathing material, with more frequent dustbaths compared to normal-lipid (N) and high-lipid (H) treatments.
Total time spent dustbathing was longest in the L treatment.
Foraging behavior was most frequent in the N treatment, and specific wing-shake behaviors varied across lipid content treatments.

Conclusions:

Laying hen preference for dustbathing substrates increases as lipid content decreases.
Current use of food particles as litter may not be optimal for dustbathing behavior due to their lipid composition.
Further research into optimal dustbathing substrates for poultry is warranted.