sniffer dog

sniffer dog (plural sniffer dogs)

1. A police dog trained to sniff out illegal goods such as drugs or explosives.
   • 2022 March 9, “Network News: Sniffer dogs hired in fight to combat metal thefts in North West”, in RAIL, number 952, page 18:

     Network Rail has introduced sniffer dogs to try to reduce the theft of signalling cables in the North West.

   Synonym: detection dog

• “sniffer dog”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.