If you have a criminal fled to three dogs in the forest you can quickly hunt down criminals and tracking is not easily lost, and move much more quickly than humans, and in complex terrain to track down criminals
If there is a criminal to escape to the forest where three dogs can quickly hunt down criminals and not easy to lose track, and the dog's moving much faster than humans, and can quickly hunt down criminals in complex terrain
If there is a single criminal escape to Sanlin police dogs can quickly chase criminals and tracking is not easily lost, and dogs movement speed than humans much faster, but also in the complex terrain quickly hunt down the criminals