Hugh Pickens writes "BBC reports that six puppies cloned from a Canadian-born sniffer dog in late 2007 have reported for duty to check for drugs at Seoul's Incheon International Airport after completing a 16-month training course. The customs agency says clones help to lower crime-fighting costs as it is difficult to find good sniffer dogs. Only about 30% of naturally-born sniffer dogs make the grade, but South Korean scientists say that could rise to 90% using the cloning method. The puppies, each called 'Toppy' for 'Tomorrow's Puppy,' are part of a litter of seven who were cloned from a 'superb' drug-sniffing Canadian Labrador retriever called Chase at a cost of about $239,000. 'They are the world's first cloned sniffer dogs deployed at work,' says customs spokesman Park Jeong-Heon. 'They showed better performances in detecting illegal drugs during the training than other naturally-born sniffer dogs that we have.'"