Detection dogs have been trained to search for many things, both animate and inanimate, including: Bed bugs. Cancer detection. Currency (e.g. large amounts of money carried by passengers in airports that should be declared to customs)
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Intensive trainingTSA canines are single purpose dogs trained to detect explosives.
Beagles and beagle mixes are the preferred breed of dog at the airport because of their keen sense of smell, non-threatening size, high food drive, and gentle disposition with the public.