"Bo" was reunited with the Moeller family of Arlington Heights, Ill., thanks to a microchip that allowed authorities to identify his owners, the Daily Herald newspaper in Arlington Heights reported Wednesday.

"I honestly hadn't thought about Bo in so long," said Melissa Moeller, 23. "It seems so far-fetched that he would be found."

Kelly Swanson of the Winnebago County Animal Services says a resident discovered Bo running loose and called the shelter.

"This is the first time ever that I have found any animal that's been gone for that long," Swanson told the Daily Herald.

Swanson says there is no way of knowing where he spent the last five years, the newspaper said.