Annotation: "Animals provide support to humans on a daily basis. Service animals are rigorously trained to assist the visually impaired as well as 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 a light on how they do-and don't-enhance our lives"-- cProvided by publisher.