Dr Andy Butterworth MRCVS is Reader in Animal Science and Policy in the Clinical Veterinary School, University of Bristol, UK. Andy teaches and carries out research in the areas of animal disease and production, animal welfare and legislation, behavioural biology, and animal welfare assessment in both farm and wild animals. He is a member of the European Food Standards Agency Scientific Panel on Animal health and Welfare, and chairs the EEER (Ethics, Economics, Education and Regulation) of the Farm Animal Welfare committee in the UK. He is editor in Chief of Elsevier's journal Veterinary and Animal Science, he lectures widely and publishes in books, and the academic and trade press, with over 200 publications to date.

• 1: Foreword, I Duncan, University of Guelph, Canada 2: Introduction, C Weeks PART 1: OUTCOMES (ANIMAL BASED) 3: Lameness, J Mench, University of California, Davis, USA 4: Measuring and auditing the welfare of broiler breeders, P Hocking, Roslin Institute (Edinburgh), UK 5: Pododermatitis and hockburn in broiler chickens, C Berg, Swedish University of Agricultural Sciences, Sweden 6: Evaluating the impact of metabolic disorders on the welfare of broilers, R Julian, University of Guelph, Canada 7: Infectious disease – morbidity and mortality, A Butterworth 8: Abnormal behaviour and fear, G S Sanotra, Swedish University of Agricultural Sciences, Sweden, and C Weeks, University of Bristol, UK PART 2: INPUTS (RESOURCE BASED) 9: The significance of biosecurity to broiler welfare, M Pattison, Independent Poultry Consultant, UK 10: Feed, S H Gordon and A W Walker, ADAS Gleadthorpe, UK, and D R Charles, D C R&D, UK 11: Light, N B Prescott, Silsoe Research Institute, UK, H H Kristensen, Royal Veterinary and Agricultural University, Denmark, and C M Wathes, Silsoe Research Institute, UK 12: Air hygiene, C Wathes, Silsoe Research Institute, UK 13: Stocking density, W Bessei, University of Hohenheim, Germany 14: Transport and handling, M A Mitchell, Roslin Insitute (Edinburgh), UK, and P J Kettlewell, Silsoe Research Institute, UK 15: Primary Processing of Poultry, S Wotton and L Wilkin ,University of Bristol, UK PART 3: WELFARE AND AUDITING ISSUES Section 1: Production Systems 16: Comparing welfare in different systems, S M Haslam and S C Kestin, University of Bristol, UK 17: Human factors influencing broiler welfare, P H Hemsworth, Victorian Institute of Animal Science, Australia, and G J Coleman, Monash University, Australia Section 2: Examples of auditing schemes and their effectiveness in assuring welfare 18: Auditing systems - are we effective? P Cook, RL Consulting Ltd, UK 19: Is UK farm assurance delivering good welfare? D Main and H R Whay, University of Bristol, UK 20: Using welfare outcomes to control intensification: The Swedish Model, C Berg and B Algers, Swedish University of Agricultural Sciences, Sweden 21: Developing and implementing a welfare audit in the Australian chicken meat industry, J L Barnett, Victorian Institute of Animal Science, Australia, and P C Glatz, South Australian Research and Development Institute, Australia Section 3: Ethical, political and future perspectives 22: Does broiler welfare matter and to whom? D B Morton, University of Birmingham, UK 23: Public attitudes and expectations, M C Appleby, The Humane Society of the United States, USA 24: A global perspective on broiler welfare standards, P Lymbery, World Society for the Protection of Animals, UK 25: Measuring broiler chicken behaviour and welfare: perspectives for automation , L PJJ Noldus, Noldus Information Technolgy, b.v., The Netherlands, and R G Jansen, Wageningen, The Netherlands