Sniffer dogs, also known as detection dogs, are specially trained animals that can identify specific scents. They are often used by law enforcement agencies to locate illegal substances like drugs or explosives. Their keen sense of smell allows them to detect these substances even in small quantities, making them valuable in security and search operations. These dogs undergo rigorous training to recognize particular odors associated with drugs, explosives, or even missing persons. Breeds like German Shepherds and Labrador Retrievers are commonly used due to their intelligence and strong olfactory abilities. Sniffer dogs play a crucial role in enhancing public safety and aiding investigations.