SAN FRANCISCO (CBS) – An animal is sniffing for food at San Francisco International Airport, but he’s just doing his job.

Skipper, an 8-year-old Beagle mix, spends his days looking for produce that could carry dangerous pests into the U.S.

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Skipper is so good at his job that he has set a record at the Port of San Francisco.

“Right before Thanksgiving, he found a banana on a flight, and a banana is not normally what you consider a big deal but it was his 20,000th seizure,” said U.S. Customs and Border Patrol Agent Peter De Souza.

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The previous record was 14,000 food seizures.

Before working at the airport, Skipper was just a stray dog living in Michigan.

He was then rescued and trained to his current job.