A tracking dog, also known as a BLOODHOUND, is a breed of dog that has been specifically trained to follow a scent and track down a person or animal. They are used by law enforcement, search and rescue teams, and hunters to help locate missing persons or animals. Bloodhounds have an incredibly powerful sense of smell and can be trained to follow a scent for miles. They are often used in criminal investigations and can even be used to track down escaped prisoners.