The LayWel project: welfare implications of changes in production systems for laying hens
- 1 March 2007
- journal article
- Published by Taylor & Francis in World's Poultry Science Journal
- Vol. 63 (1) , 101-114
- https://doi.org/10.1017/s0043933907001328
Abstract
The conditions under which laying hens are kept remain a major animal welfare concern. It is one of the most intensive forms of animal production and the number of animals involved is very high. Widespread public debate has stimulated the call for more animal friendly, alternative systems to barren conventional cages. Directive 1999/74/EC has encouraged technical changes in current systems. Not only have traditional cages been modified (so-called ‘enriched cages’), but also new alternative systems (e.g. aviaries) have been developed. There is an ongoing need to evaluate the actual welfare status of hens in these novel systems including those on commercial farms. The LayWel project, was funded via the European Commission's Sixth Framework Programme and national funding from several EU countries. Its general objective was to produce an evaluation of the welfare of laying hens in various systems, with special focus on enriched cages, and to disseminate the information in all member states of the EU and associated countries. The project took into account pathological, zootechnical, physiological and ethological aspects. A major achievement of the LayWel project was the compilation of a database collecting data from different housing systems and thus enabling data comparison. The project partners recommend that support is given to maintaining the database in the future so that data can be more reliably modelled. As the type of data collected did not often allow a formal statistical analysis the evaluation of welfare was a presentation of risk factors and advantages and disadvantages of various housing systems. Conclusions are that, with the exception of conventional cages, all systems have the potential to provide satisfactory welfare for laying hens. However this potential is not always realised in practice. Among the numerous explanations are management, climate, design, different responses by different genotypes and interacting effects. A second major achievement of the project was the development of feather scoring and integument (skin, head and feet) scoring systems together with comprehensive sets of photographs. It is recommended that the integument scoring systems are widely adopted and used in on-going research. Farms should also routinely and frequently carry out integument scoring to assist in the detection of damaging pecking, which is currently a widespread welfare problem. Within LayWel an on-farm auditing procedure was developed in the form of a manual for self-assessment. The manual first explains what is meant by welfare and outlines the relevance of welfare assessment. It also summarises risks to welfare in the main categories of housing system. The second part contains recording forms, with guidance for assessing hen welfare. These enable regular checks of a range of indicators of laying hen welfare to be carried out systematically. The indicators were chosen to be relevant to hen welfare as well as feasible and reliable to apply in practice. A series of conclusions and recommendations were made on various aspects of housing systems, behaviour, health and mortality and other matters in relation to bird welfare. Full details of these and all other aspects of the LayWel project can be found on www.LayWel.eu. The information is also available on CDROM of which copies are freely available on request.Keywords
This publication has 14 references indexed in Scilit:
- Behavioural needs, priorities and preferences of laying hensWorld's Poultry Science Journal, 2006
- Effects of stocking density, flock size and management on the welfare of laying hens in single-tier aviariesBritish Poultry Science, 2006
- Effect of furnished small group housing systems and furnished cages on mortality and causes of death in two layer strainsBritish Poultry Science, 2005
- Management and housing systems for layers – effects on welfare and productionWorld's Poultry Science Journal, 2005
- Behavioural Priorities of Laying HensAvian and Poultry Biology Reviews, 2003
- No Effect of Social Competition on Sham Dustbathing in Furnished Cages for Laying HensActa Agriculturae Scandinavica, Section A — Animal Science, 2002
- Effects of group size on performance, health and birds’ use of facilities in furnished cages for laying hensActa Agriculturae Scandinavica, Section A — Animal Science, 1997
- Fear and adaptability in poultry: insights, implications and imperativesWorld's Poultry Science Journal, 1996
- The handling and transport of broilers and spent hensApplied Animal Behaviour Science, 1990
- Pre‐laying behaviour in battery cagesBritish Poultry Science, 1985