Animal welfare science has expanded substantially over the last few decades. Historically a fringe concern, the welfare of the animals in our care is now a key consideration for owners, agricultural industry workers and consumers alike. Sharing lessons learned from animal welfare and human psychological research for better results across the species divide isn't necessarily a new idea. But over the last 25 years, how have attitudes to welfare and mental disorders changed in human medicine and psychiatry, and in studies of farmed, companion, laboratory and wild animals? How have research methodologies developed? Essentially, where have we got to now? In this book, the world's first professor of animal welfare, Don Broom, reflects on shared insights of how all species can better cope with challenges, from stress to pain.