A sniffer dog is a specially trained canine that uses its keen sense of smell to detect specific substances. These dogs are often employed by law enforcement agencies to find illegal drugs, explosives, or even missing persons. Their ability to identify scents is far superior to that of humans, making them valuable assets in various situations. Sniffer dogs undergo rigorous training to learn how to recognize particular odors and alert their handlers. They are commonly seen at airports, border crossings, and large public events, where they help ensure safety and security. The bond between a sniffer dog and its handler is crucial for effective teamwork in these operations.