Rhino poachers entering Kruger National Park are increasingly being run down by packs of unleashed hunting hounds in full cry, followed by a chopper tracking their hi-tech GPS collars. As the baying pack approaches, the poacher has no idea the dogs are trained to not attack. They won't bite him (there are legal implications), but if he tries to harm the dogs, rangers will fire from the chopper. The poachers know this and no dog has yet
been lost to a poacher’s bullet.