Hello Shot One, this is not that uncommon either, especially at smaller fields in Italy for instance. Quite often get sniffed at by the drugs dog on the way thru' customs. Keep moving though 'cos they'll pee on your leg if you stop!!
Similarly, in a previous life flying freight/mail to the Channel Islands all the bags off the a/c would be laid out in the hangar whilst the dog had a good rummage.
Seriously though, this is a whole world removed from invasive personal drug testing which quite rightly needs its own debate.