A viewer sent us video of the rescue.
It happened around 7:30 p.m. at North Central and West California avenues.
The tiny dog somehow escaped, ending up on the ledge of an apartment building.
The little guy put up a fight, but a firefighter managed to get a leash on him and eventually pick him up.
Spectators on the ground cheered and applauded as the dog was successfully brought back into the building.