prison yard'This is kind of a curveball,' says corrections officers' unionNearly a century ago, a pigeon breeder approached federal customs officers with a bit of an odd problem.Randle said the package contained about 30 grams of crystal meth, which he described as a "fairly substantial" amount of the intensely addictive stimulant.Since the drone crackdown, Randle said smugglers might be turning back to "old school" methods like pigeons or "throwover" — where someone outside lobs a package over the fence."We've been focusing so much on drone interdiction ... now we have to look at I guess pigeons again," said Randle, who hasn't heard of another live pigeon incident in B.C.Homing pigeons have been used to carry messages since the Roman Empire, particularly valued during the First and Second World Wars for their ability to navigate long distances to return to their home lofts with key messages."