1721 A. Ramsay I. 15 (note) In Allusion to a scent Dog.
1894 S. R. Crockett 29 Nosing them for myself like a Scent-Dog after birds.
2009 (National ed.) 4 Nov. a1/3 A 2004 report by the F.B.I. states that use of scent dogs, properly conducted, ‘has become a proven tool that can establish a connection to the crime’.