Lynda Birke, is Visiting Professor, Anthrozoology, University of Chester. She was trained in biology (animal behaviour), but has also done interdisciplinary work, especially in human-animal studies. Her most recent book (co-authored) is The Sacrifice: How scientific experiments transform animals and people (Purdue University Press, 2007)Jo Hockenhull, Ph.D. (2010) in Equine Welfare, University of Liverpool, is a research assistant in the Animal Welfare and Behaviour Group at the University of Bristol School of Veterinary Sciences.