In the war on poaching, some of the best defenders have four legs. Trained canines are used in some of South Africa's national parks to detect wildlife contraband like rhino horns, pangolin scales, and ivory at airports and roadblocks. Other dogs are trained to track and apprehend poachers in the field. According to Save the Rhino, 9,885 rhinos have been lost to poaching in the last decade. But Carl Thornton, founder and director of Pit-Track K9 Conservation and Anti-Poaching Unit, says the numbers are likely much higher.