The word stud is often restricted to larger domesticated (especially farm) animals, such as cattle and horses. A specialized vocabulary exists for the studs of other animals, such as kennel (dog), cattery (cat) and aviary (birds).
During the Middle Ages, stud farms were often managed as part of a monastery. At the time, few people apart from monks could read and write, and so they were charged with the responsibility of recording pedigrees. The Carthusian monks are famous for their role in breeding the Andalusian horse in Spain, while monasteries in Bavaria were responsible for the original Rottaler horse.
A state stud farm (German: Landgestüt, French: Haras) is one that is owned by the government. The first state studs were ordered by Louis XIV of France in 1665. The purpose of the state studs was to make high-quality horses available to local breeders and farmers to accelerate the evolution of local horses. Stud farms which kept a herd of mares in addition to stallions were dubbed "Principal" Studs. State-owned stallions were made accessible with low or no stud fees. Germany is most famous for its Principal and State Studs, which have been instrumental in the shaping of the German riding horses and several breeds of German cold bloods. The Hanoverian is associated with the State Stud of Celle, the Rhinelander and Westphalian with the State Stud of Warendorf, the Brandenburger with the Principal Stud of Neustadt an der Dosse, and so on.
Other European state studs include:
The German city of "Stuttgart" gets its name from stud farms.
Around the world, private individuals have breeding farms of various sizes that are dedicated to animal breeding, usually of purebred livestock. Some may have originally been founded with government assistance or sponsorship, or owned by political leaders, while others are solely the private enterprise of those who own them. Some of the largest and most impressive are those dedicated to Thoroughbred horse breeding, such as the historic Claiborne Farm in Kentucky, USA or the Darley Stud, owned by Dubai H.H. Sheikh Mohammed bin Rashid Al Maktoum, which stands over fifty stallions at stud in facilities located in seven countries.
Many stud farms make male animals available for breeding to outside female animals that are not owned by the stud farm. Doing so provides an outside source of revenue to a stud farm via the stud fees paid to obtain the services of the stud animal as well as contributing to the overall genetic diversity of the animal's offspring. At state stud farms, stud service is not only a source of income, but due to the high standards set for breeding animals, has an overall effect of improving the quality of animals throughout an area.