Canine Trails is a term used to describe the practice of using a dog's sense of smell to track SCENTS. This practice is often used in search and rescue operations, as well as for tracking down criminals or lost persons. The term 'canine trails' is derived from the word 'SCENT, ' which is a six-letter word that describes the odor that a dog can detect and follow. By following these SCENTS, dogs are able to locate people or objects that may otherwise be difficult to find.