The bloodhound is a breed of dog known for its keen sense of smell and ability to track SCENTS. It is often used by detectives, or sleuths, to help them follow a trail or detect a SCENT. Bloodhounds have large jowls and a long, droopy NOSE that helps them pick up SCENTS more easily. They are also able to detect and follow SPOOR, or the SCENT left behind by an animal or person. Bloodhounds are able to SNIFF out SCENTS that humans cannot detect, making them invaluable in DETECTIVE work.