A Jack Russell terrier that went missing from its Pennsylvania home has turned up at an animal shelter nearly 3,000 miles away.

A good Samaritan this month spotted the 7-year-old dog named Gidget wandering in the Portland suburb of Tualatin, and brought her to the Bonnie L. Hays Animal Shelter, said Deborah Wood, manager of Washington County Animal Services.

Wood said Wednesday that a microchip implanted in Gidget revealed that the owner lived near Philadelphia. Contacted by the shelter, the owner said her dog has been missing since April 22, two days after Easter.

It’s a mystery how the dog arrived in Oregon.

“She’s never lived here; there is nothing that would bring her here,” Wood said. “So a human somehow brought her here, but we don’t know who or how.”