Animals provide support to humans on a daily basis. Service animals are rigorously trained to assist the visually impaired and people with life-threatening medical conditions. Therapy animals are trained to provide comfort to those in need. Emotional support animals give their owners companionship and therapy. While some of these animals have been scientifically proven to be indispensable, the value of others is dubious. The viewpoints in this volume explore the expanding world of assistance animals, shedding light on how they do and do not enhance our lives.