Did You Know?
People began using bird-dog as a verb meaning "to closely watch someone or something" or "to doggedly seek out someone or something" in the early 20th century. Both meanings reflect skills likely to be possessed by a well-trained bird dog—that is, a hunting dog trained to hunt or retrieve birds.
now it means to watch closely to seek out something
With millions of city dollars invested, citizens are bird-dogging the riverfront development project to its completion.