(BA Biology, DPhil Ethology and Neurobiology) is a Professor of Animal Science and the Director of the Center for Animal Welfare at the University of California, Davis. She conducts research on the behaviour and welfare of poultry and small laboratory animals, with a particular emphasis on management and environmental enrichment. She serves on numerous national and international committees and boards that address issues related to farm and laboratory animal welfare, and teaches courses on animal welfare and animal ethics.