A bird dog is a type of gun dog or hunting dog used to hunt or retrieve birds or other small game animals. by tracking their scent in the air. Bird dog breeds are receptive to being trained to retrieve hunted birds. In the Southern United States the term bird dog refers to dog breeds such as the pointer, English setter, Red setter, German shorthai...
A sporting dog bred and trained to hunt game birds.
(from the article `dog`) ...the air. Both are able to distinguish one person from another even after a considerable passage of time. Hunting dogs—such as pointers, ...
to supervise another too closely or continuously 
[n] - a gun dog trained to locate or retrieve birds
noun a gun dog trained to locate or retrieve birds
A sporting dog bred and trained to hunt game birds.
one of any of various breeds of dogs trained to hunt or retrieve birds. · a person hired to locate special items or people, esp. a talent scout who seeks out promising athletes. · a person who steals another person's date.