Do animals have feelings? Until recently most scientists didn't think so. They thought that most animals behave instinctively-that they don't have feelings such as happiness, sadness, grief, vengefulness, or compassion. Many scientists are now changing their minds. Close observation of animals is tending to show that animals may have feelings quite similar to human feelings. This collection of true animal behavior, witnessed by naturalists and others, is both heartwarming and thought-provoking.