The goal is to see at least 40 homeless dogs and cats go to permanent homes.
"We're just hoping with all the foot traffic, people come by, even if they don't meet (a pet) this weekend that they fall in love with, that it gets them thinking about (adopting)," said Ginny Sims, manager of the Southern Pines Animal Shelter.
"It's been wonderful, it's all for the one cause, getting these babies adopted," said Julie Beckham, a board member with the Hub City Humane Society.
The event, held in the parking lot of the Hattiesburg PetSmart, is featuring some special adoption rates and it will continue on Sunday.
The event was the perfect opportunity Saturday for Purvis resident George Hoffman and his family to adopt a puppy from the Hub City Humane Society. They took home a 10-week-old terrier mix they named "Max."
"We like dogs and cats and it's just easier to take one that nobody wants and give it a good home and family," Hoffman said.
Organizations taking part in the event include Southern Pines Animal Shelter, Hub City Humane Society, Southern Cross Animal Rescue, North Mississippi Great Dane Rescue and Healthy Happy Pet Adoption.