Police, firefighters and neighbors searched for the children, ages 5 and 8, after they went missing while walking on trails near their wooded neighborhood in the Newnan area Monday.
Nearby neighbor Carvin Young tells CBS Atlanta that he grabbed his 3-year-old Chihuahua and joined the search.
Young said the dog, Bell, picked up their scent and began running until she reached them.
Rebecca Parga, the girls’ mother, says her children play with Bell almost every day, and the dog is very familiar with their scent.
Authorities say the girls, Carlie and Lacey, were scared when they were found but were not hurt.