David J Mellor is Professor of Animal Welfare Science, Professor of Applied Physiology and Bioethics, and Co-Director of the Animal Welfare Science and Bioethics Centre at Massey University, New Zealand.

Emily Patterson-Kane is an Animal Welfare Scientist at the American Veterinary Medical Association in Illinois, USA.

Kevin J Stafford is Professor of Veterinary Ethology and Co-Director of the Animal Welfare Science and Bioethics Centre at Massey University, New Zealand.

UFAW, founded 1926, is an internationally recognised, independent, scientific and educational animal welfare charity. This book is an excellent new edition to the UFAW series.