Ben Affleck arrived in Atlanta via a private plane on Monday afternoon with a furry friend.
"It's their new puppy," a source close to Affleck and Jennifer Garner tells PEOPLE. "It's a family dog. It's another sign they are working together to raise kids and be in a kind relationship."
Affleck flew to Georgia for the second time this month to see his children – Violet, 9; Seraphina, 6; and Samuel, 3 – who are staying with his soon-to-be-ex-wife Garner as she films her new movie, Miracles from Heaven.
Affleck was spotted still wearing his wedding ring, a gesture that a source tells PEOPLE is intended to help the kids cope with their parents' divorce.
Violet, Seraphina, and Samuel "are a big part of why they're still wearing [the rings]," according to the source. "They just want them to be okay."
The stars have taken numerous measures to protect their children in the wake of the split. Affleck continues to live on the property that he shares with Garner in Los Angeles and resides in a guest house at her rented home in Atlanta.
Reporting by LIZ MCNEIL