
A retriever is a type of gun dog that retrieves game for a hunter. Generally gun dogs are divided into three major classifications: retrievers, flushing spaniels, and pointing breeds. Retrievers were bred primarily to retrieve birds or other prey and return them to the hunter without damage; retrievers are distinguished in that nonslip retrieval is their primary function. As a result, retriever breeds are bred for soft mouths and a great willingness to please, learn, and obey. A soft mouth refers to the willingness of the dog to carry game in its mouth without biting into it. "Hard mouth" is a serious fault in a hunting dog and is very difficult to correct. A hard-mouthed dog renders game unpresentable or at worst inedible.

The Chesapeake Bay Retriever is a large-sized breed of dog belonging to the retriever, gundog, and sporting breed groups. The breed was developed in the United States Chesapeake Bay area during the 19th century. Historically used by area market hunters to retrieve waterfowl, pull fishing nets, and rescue fishermen, it is today primarily a family pet and hunting companion. They are often known for their love of water and their ability to hunt. It is a medium to large sized dog similar in appearance to the Labrador Retriever. The Chesapeake has a wavy coat, rather than the Labrador's smooth coat. They are described as having a bright and happy disposition, courage, willingness to work, alertness, intelligence, and love of water as some of their characteristics.

The Curly-coated Retriever is a breed of dog originally bred in England for upland bird and waterfowl hunting. It is the tallest of the retrievers and is easily distinguishable by the mass of tight curls covering its body. Curly Coated and Wavy Coated were the first two recognised retriever breeds, established as early as 1860.

The Flat-coated Retriever is a gundog breed originating from England. It was developed as a retriever both on land and in the water.

The Golden Retriever is a medium-large gun dog that was bred to retrieve shot waterfowl, such as ducks and upland game birds, during hunting and shooting parties. The name "retriever" refers to the breed's ability to retrieve shot game undamaged due to their soft mouth. Golden retrievers have an instinctive love of water, and are easy to train to basic or advanced obedience standards. They are a long-coated breed, with a dense inner coat that provides them with adequate warmth in the outdoors, and an outer coat that lies flat against their bodies and repels water. Golden retrievers are well suited to residency in suburban or country environments. They shed copiously, particularly at the change of seasons, and require fairly regular grooming. The Golden Retriever was originally bred in Scotland in the mid-19th century.

The Labrador Retriever, often abbreviated to Labrador or Lab, is a medium-large gun dog from the United Kingdom that was developed from imported Canadian fishing dogs. The Labrador is one of the most popular dog breeds in a number of countries in the world, particularly in the Western world.

The Nova Scotia Duck Tolling Retriever is a medium-sized gundog bred primarily for hunting. It is often referred to as a "toller". It is the smallest of the retrievers, and is often mistaken for a small Golden Retriever. Tollers are intelligent, eager to please, alert, and energetic. The name "toller" is derived from their ability to lure waterfowl within gunshot range. The breed originated in Yarmouth County, Nova Scotia, Canada. The American Kennel Club ranks the toller as the 87th most popular dog breed.