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Laying hen welfare I. Social environment and space

Published online by Cambridge University Press:  27 April 2016

T.M. WIDOWSKI ,
P.H. HEMSWORTH ,
J.L. BARNETT  and
J.-L. RAULT
T.M. WIDOWSKI*
Affiliation:
Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada
P.H. HEMSWORTH
Affiliation:
Animal Welfare Science Centre, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
J.L. BARNETT
Affiliation:
Animal Welfare Science Centre, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
J.-L. RAULT
Affiliation:
Animal Welfare Science Centre, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
*
Corresponding author: [email protected]
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Abstract

Confinement housing appears to be at the forefront of concern about farm animal welfare. Although many factors may affect the welfare of commercial laying hens housed in cage and non-cage systems, welfare issues in confinement systems often involve behavioural restrictions, while many welfare issues in more extensive systems involve health and hygiene. Hens require an absolute amount of three-dimensional space in order to be able to perform basic body movements. They may prefer to distance themselves from other birds, but their strength of motivation to do so has not been thoroughly investigated, and preferred inter-individual distances may vary with activity. The relationships between the effects of space and group size on behaviour are not well understood, particularly in large groups where birds may cluster together around resources and at different times of day. There are common risks to hen welfare posed by both cage and non-cage systems such as overcrowding. However, some welfare issues present a greater risk in one system compared to another. When considering space and social environment, the comparison of cage and non-cage systems must take into account the threats to welfare that are specific to each system. Furthermore, this review highlights the importance of the design of the housing system rather than just the housing system per se.

Keywords

cageconfinementgroup sizehousing systemmovementspacestocking density
Type
Reviews
Information
World's Poultry Science Journal , Volume 72 , Issue 2 , June 2016 , pp. 333 - 342
Copyright
Copyright © World's Poultry Science Association 2016 

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