COLUMBUS, Ohio — A stray dog wandered into an Africa exhibit at the Columbus zoo, but fortunately none of the wild animals were around.

The staff at the Columbus Zoo & Aquarium is trying to figure out how the year-old border collie mix got into the Heart of Africa exhibit last week.

The Columbus Dispatch reports that zoo security heard the dog barking in the exhibit's watering hole area, which wasn't inhabited by its usual residents because it's winter.

Someone at the zoo posted the dog's photo on a lost pets Facebook page, and she was reunited with her owners. They had lost the dog, named Zoey, that evening when she slipped out of her collar during a walk and ran away. The zoo is about 4.8 kilometres away.