A Florida woman has been reunited with her dog 12 years after it went missing 1600kms from her home. 

The toy fox terrier’s owner Katheryn Strang continued to pay for the dog’s microchip before she was found at a shelter in Pittsburg. 

Ms Strang said she has no idea how her pet travelled so far. 

"They are like your babies. You don't give up hope," Ms Strang said.