How is it that scientists, so fond of dogs at home, may become so seemingly insensitive to animal suffering as soon as they don their lab coats? How can science teach us that animals feel no pain when our common sense observations tell us otherwise? Rollin offers welcome insight into questions like these in The Unheeded Cry, a rare, reasonable account of the difficult and controversial issues surrounding the use of animals. Widely hailed by animal activists and scientists alike on its first appearance, the book is updated here to include recent changes in thinking and practice in this fast-growing field. This work will help professionals and amateurs with an interest in the moral status of animals in their attempts to penetrate the fortress of scientific ideology and practice, and to effect change. Lively and lucid, The Unheeded Cry asks whether experimental animals feel pain and, if so, what should humans as responsible moral agents do about it?