Field Dog Stud Book
The Field Dog Stud Book is the oldest purebred
Purebreds, also called purebreeds, are cultivated varieties or cultivars of an animal species, achieved through the process of selective breeding...

The domestic dog is a domesticated form of the gray wolf, a member of the Canidae family of the order Carnivora. The term is used for both feral and pet varieties. The dog may have been the first animal to be domesticated, and has been the most widely kept working, hunting, and companion animal in...

Breed registry
A breed registry, also known as a stud book or register, in animal husbandry and the hobby of animal fancy, is an official list of animals within a specific breed whose parents are known. Animals are usually registered by their breeders when they are still young...

 in the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 having started registrations in and currently maintaining records from 1874. The Field Dog Stud Book currently registers around 5,000 litters each year and has registered several million dogs. In addition to registration the FDSB maintains the results of DNA
Deoxyribonucleic acid is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms . The DNA segments that carry this genetic information are called genes, but other DNA sequences have structural purposes, or are involved in...

 testing of dogs to promote genetic health.

The Field Dog Stud Book focuses on dogs breds to perform in the field. It supports no conformation show
Conformation show
Conformation shows, also referred to as breed shows, are a kind of dog show in which a judge familiar with a specific dog breed evaluates individual purebred dogs for how well the dogs conform to the established breed type for their breed, as described in a breed's individual breed standard.A...

ing. This stud book is affiliated with the field trial magazine "The American Field" which is the oldest continuously published sporting dog journal in the U.S.

The FDSB registers dogs of all breeds, but is primarily for pointing, flushing, and retrieving breeds of gun dog
Gun dog
thumb|right|A group of Gun dogs as printed in Dogs of All Nations by W.E. Mason in 1915Gun dogs, also gundogs or bird dogs, are types of dogs developed to assist hunters in finding and retrieving game, usually birds. Gun dogs are divided into three primary types: Retrievers, flushing dogs, and...

. Among some breeds, such as English Setter
English Setter
The English Setter is a breed of dog. It is part of the Setter family, which includes red Irish Setters, Irish Red and White Setters, and black-and-tan Gordon Setters. It is a gun dog, bred for a mix of endurance and athleticism.- Appearance :...

s, the FDSB will register the dog in its particular breed as well as the particular line within the breed such as the Llewellin Setter. Many dogs are registered with the FDSB as well as with other registries and with kennel clubs.
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