What is the key difference between tracking and trailing in MWD work regarding scent source and path pattern?

• A. Trailing uses general ambient odor and drift, often producing a shorter, less linear path.
• B. Tracking follows the human’s exact footprint and ground scent to reconstruct a path.
• C. Tracking uses long-range diffusion of scent in air currents.
• D. Trailing follows exact footprints.

Answer: (B)

The main idea being tested is how scent sources and how a scent moves shape what a MWD does when asked to locate a person. In tracking, the dog is following cues left on the ground—footsteps, ground oils, sweat, and other scent residues that stay with the surface as the person moves. Those ground-based cues create a path that mirrors the actual route taken, so the dog can reconstruct the precise sequence of steps and turns.

That’s why the correct statement is that tracking uses the human’s exact footprint and ground scent to reconstruct a path. It captures both the source (ground-level scent from the feet) and the pattern (a direct, line-by-line recreation of the route). Trailing, on the other hand, relies on scent carried by air—ambient odor that drifts with wind and currents—so the resulting path tends to be less linear and more influenced by environmental conditions, not exact footprints on the ground.

The other descriptions don’t fit because tracing along diffuse air scent isn’t about exact footprints, and following exact footprints would imply trailing rather than tracking, which isn’t how trailing works.