Hunting and herding dogs come in all shapes and sizes. Some have a natural ability to do their work, but training with humans is also important. Learn about how a miniature dachshund forces a rabbit into the path of his hawk-hunting partner, and how the well-trained dogs of Deer Search, Inc. track wounded deer. Discover how a border collie gathers sheep into a pen, and what makes a scrappy Australian cattle dog go head-to-head with a 1,000-pound bull in order to herd it.