okay.....I'll bring tequilla...

The Swedish Customs Service started to train drug detector dogs as early as
1967 in collaboration with the then State-owned Dog Training Centre. The dog
is one of the most valuable agents for combating the smuggling of narcotics
thanks to its extraordinarily well developed sense of smell. The dog's sense
of smell - combined with the handler's experience and knowledge of hiding
places, smuggling methods and routes - heightens the effects of a search.
Close interaction between the dog and its handler is one of the most
important conditions for getting good results.