LOS ANGELES -- A pair of black Labrador retrievers trained to find pirated DVD movies demonstrated their skills Monday at Clover Avenue Elementary School.

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The two labs visited the school as part of a tour that includes stops in Mexico City and Washington, D.C. The demonstrations are designed to highlight World Intellectual Property Day on April 26.

The dogs, Lucky and Flo, assist law enforcement agencies throughout the world. They sniff out pirated DVD movies.

John Malcolm, of the MPAA, said the dogs are so effective that crime syndicates put a bounty on their heads. The Malaysian pirate operation placed a $30,000 bounty on Lucky and Flo after the dogs found DVDs connected to the ring last year.

Authorities increased security around the two dogs after the threats.

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September 2006 Images: Dogs Visit Burbank School

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The dogs were trained after a study in 2004 determined that dogs could be used to detect polycarbonate and other chemicals used in optical discs. Neil Powell, a trainer in Northern Ireland known for training dogs to sniff bombs and other devices, trained the two animals.

They are believed to be the first DVD-sniffing dogs in the world.

The Motion Picture Association of America showed off the dogs in Burbank in September. The stop in Burbank was the second leg in a world tour aimed at spreading an anti-piracy message and encouraging the use of more dogs to detect illegal DVDs.

MPAA officials said the film industry lost $18.2 billion in 2005 because of piracy operations.

Malcolm noted that it costs movie pirates only about 10 cents to copy a movie onto a DVD.