Maui and her sister Juniper were adopted from Russia. They were flow to Seattle-Tacoma International Airport last May as puppies.
The two dogs recognizing each other nearly a year later has made them an internet sensation. With more than 15 million visitors exploring the historic district annually, people find the encounter quite remarkable.
A worker at the Pike Place Market captured the moment in a video, and nearly 3 million people have watched it on Facebook.
"I witnessed the coolest thing," the Facebook post said. "They even had identifying tattoos that confirmed it. This joyful reunion went on for over a half an hour, in fact they were still at it when I left the market."
After the two families chatted, they realized they briefly met while picking the dogs up at the airport. They've exchanged phone numbers and plan to meet again soon for a play date at a dog park.