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The effect of perches installed in cages on laying hens

Published online by Cambridge University Press:  15 May 2014

P.Y. HESTER
P.Y. HESTER*
Affiliation:
Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
*
Corresponding author: phester@purdue.edu
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Abstract

The public wants assurances that animals used for food are raised humanely. Conventional cages for egg laying hens do not meet hen's behavioural needs, but cages have potential advantages such as improved liveability and respiratory health because of less aerial ammonia and dust as compared to non-cage systems. Providing amenities to cages might be a compromise that allows hens to reap some of the advantages of conventional cages and also better meet their behavioural needs. This review focuses on the perch as a furnishing and how its design and addition to the cage can affect welfare and production efficiencies of egg laying strains of chickens. Hens should have access to perches because of their high motivation and preference for perching. At night, hens like to perch at the same time which requires a straight perch space of 12 and 15 cm for White Leghorn and brown hybrids, respectively. Besides meeting a behavioural need, perches in cages improve bone strength, but the improvement is not great enough to prevent adult keel fractures and deformities. Perch access improves feather quality for the back but not for other feather tract areas. Foot pad, toe, and nail health are often improved with perch access in cages of smaller group sizes. With the exception of dirty and cracked eggs, perches installed in cages do not deleteriously affect hen performance. Commercial perches are available in different shapes (e.g., round, circular, or mushroom) and compositions (e.g., wood, plastic, or metal). There is no perfect perch relative to its material composition or shape. Wooden perches offer a rougher texture but harbour mites in crevices. Future research should concentrate on perch redesign that avoids slippery surfaces allowing hen's feet to better grip the perch, prevents keel fractures, is easily cleaned, and does not harbour parasites or pathogens.

Keywords

perchhenpulletcageeggenrichmentfurnishingkeel
Type
Review Article
Information
World's Poultry Science Journal , Volume 70 , Issue 2 , June 2014 , pp. 247 - 264
Copyright
Copyright © World's Poultry Science Association 2014 

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