A field trial is a competitive event for gun dogs. Field trials are conducted for pointing dogs and setters, retrievers and spaniels, with each assessing the different types various working traits. In the United States, field trials are also conducted for basset hounds, beagles, and dachshunds.

Gun dogs or bird dogs are types of hunting dogs developed to assist hunters in finding and retrieving game, typically various fowls that are shot down on the flight. The term hunting dog is broad and includes all breeds and skills of hunting canines, but "gun dogs" refers to canines that are trained to work alongside a loud firearm while hunting or retrieving game. Gun dogs are divided into three main categories: pointers and retrievers, setters and spaniels, and water dogs.