Where you hunt depends on the dog and the game.

Upland birds
Pointers and spaniels shine in grasslands, crop edges and brushy draws that hold quail and pheasants.
Waterfowl
Retrievers work marshes, flooded timber and big water.
Hound country
Beagles run rabbits in brushy farm country, and hounds trail raccoons and bears in big woods where hound hunting is legal.