# Veterinary medicine

Veterinary medicine is the branch of medicine that deals with the prevention, management, diagnosis, and treatment of disease, disorder, and injury in non-human animals. The scope of veterinary medicine is wide, covering all animal species, both domesticated and wild, with a wide range of conditions that can affect different species.
Veterinary medicine is widely practiced, both with and without professional supervision. Professional care is most often led by a veterinary physician (also known as a veterinarian, veterinary surgeon, or "vet"), but also by paraveterinary workers, such as veterinary nurses, veterinary technicians, and veterinary assistants. This can be augmented by other paraprofessionals with specific specialties, such as animal physiotherapy or dentistry, and species-relevant roles such as farriers.
Veterinary science helps human health through the monitoring and control of zoonotic disease (infectious disease transmitted from nonhuman animals to humans), food safety, and through human applications via medical research. They also help to maintain food supply through livestock health monitoring and treatment, and mental health by keeping pets healthy and long-living. Veterinary scientists often collaborate with epidemiologists and other health or natural scientists, depending on type of work. Ethically, veterinarians are usually obliged to look after animal welfare. Veterinarians diagnose, treat, and help keep animals safe and healthy.

## History
### Premodern era

Archeological evidence, in the form of a cow skull upon which trepanation had been performed, shows that people were performing veterinary procedures in the Neolithic (3400–3000 BCE).
The Egyptian Papyrus of Kahun (Twelfth Dynasty of Egypt) is the first extant record of veterinary medicine.
The Shalihotra Samhita, dating from the time of Ashoka, is an early Indian veterinary treatise. The edicts of Asoka read: "Everywhere King Piyadasi (Asoka) made two kinds of medicine (चिकित्सा) available, medicine for people, and medicine for animals. Where no healing herbs for people and animals were available, he ordered that they be bought and planted."
Hippiatrica is a Byzantine compilation of hippiatrics, dated to the fifth or sixth century AD.
The first attempts to organize and regulate the practice of treating animals tended to focus on horses because of their economic significance. In the Middle Ages, farriers combined their work in horseshoeing with the more general task of "horse doctoring". The Arabic tradition of Bayṭara, or Shiyāt al-Khayl, originates with the treatise of Ibn Akhī Hizām (fl. late ninth century).
In 1356, the Lord Mayor of London, Sir Henry Picard, concerned at the poor standard of care given to horses in the city, requested that all farriers operating within a 7-mile (11-km) radius of the City of London form a "fellowship" to regulate and improve their practices. This ultimately led to the establishment of the Worshipful Company of Farriers in 1674.
Meanwhile, Carlo Ruini's book Anatomia del Cavallo (Anatomy of the Horse) was published in 1598. It was the first comprehensive treatise on the anatomy of a nonhuman species.

### Establishment of profession

The first veterinary school was founded in Lyon, France, in 1762 by Claude Bourgelat. According to Lupton, after observing the devastation being caused by cattle plague to the French herds, Bourgelat devoted his time to seeking out a remedy. This resulted in founding a veterinary school in Lyon in 1761, from which establishment he dispatched students to combat the disease; in a short time, the plague was stayed and the health of stock restored, through the assistance rendered to agriculture by veterinary science and art. The school received immediate international recognition in the 18th century and its pedagogical model drew on the existing fields of human medicine, natural history, and comparative anatomy.
The Swedish veterinary education received funding 1774, and was officially started May 8th 1775 when the king Gustaf III signed the document. Peter Hernquist, who had studied for Carl von Linné in Uppsala, and also studied in Lyon with Claude Bourgelat, was head of school and is considered father of veterinary medicine in Sweden.
The Odiham Agricultural Society was founded in 1783 in England to promote agriculture and industry, and played an important role in the foundation of the veterinary profession in Britain. A founding member, Thomas Burgess, began to take up the cause of animal welfare and campaign for the more humane treatment of sick animals. A 1785 society meeting resolved to "promote the study of Farriery upon rational scientific principles."
Physician James Clark wrote a treatise entitled Prevention of Disease in which he argued for the professionalization of the veterinary trade, and the establishment of veterinary colleges. This was finally achieved in 1790, through the campaigning of Granville Penn, who persuaded Frenchman Benoit Vial de St. Bel to accept the professorship of the newly established veterinary college in London. The Royal College of Veterinary Surgeons was established by royal charter in 1844. Veterinary science came of age in the late 19th century, with notable contributions from Sir John McFadyean, credited by many as having been the founder of modern veterinary research.
In the United States, the first schools were established in the early 19th century in Boston, New York City, and Philadelphia. In 1879, Iowa Agricultural College became the first land-grant college to establish a school of veterinary medicine.

## Veterinary workers
### Veterinary physicians

Veterinary care and management are usually led by a veterinary physician (usually called a veterinarian, veterinary surgeon or "vet") who has received their doctor of veterinary medicine degree. This role is the equivalent of a physician or surgeon (medical doctor) in human medicine, and involves postgraduate study and qualification.
In many countries, the local nomenclature for a vet is a protected term, meaning that people without the prerequisite qualifications and/or registration are not able to use the title, and in many cases, the activities that may be undertaken by a vet (such as animal treatment or surgery) are restricted only to those people who are registered as vet. For instance, in the United Kingdom, as in other jurisdictions, animal treatment may be performed only by registered vets (with a few designated exceptions, such as paraveterinary workers), calling oneself a vet without being registered or performing any treatment is illegal.
Most vets work in clinical settings, treating animals directly. They may be involved in a general practice, treating animals of all types; may be specialized in a specific group of animals such as companion animals, livestock, laboratory animals, zoo animals, or horses; or may specialize in a narrow medical discipline such as veterinary surgery, dermatology, cardiology, neurology, laboratory animal medicine, internal medicine, and more.
As healthcare professionals, vets face ethical decisions about the care of their patients. Current debates within the profession include the veterinary ethics of purely cosmetic procedures on animals, such as declawing of cats, docking of tails, cropping of ears, and debarking on dogs.
A wide range of surgeries and operations is performed on various types of animals, but not all of them are carried out by vets. In a case in Iran, for instance, an eye surgeon managed to perform a successful cataract surgery on a rooster for the first time in the world.

### Paraveterinary workers

Paraveterinary workers, including veterinary nurses, veterinary technicians, and veterinary assistants, either assist vets in their work, or may work within their own scope of practice, depending on skills and qualifications, including in some cases, performing minor surgery.
The role of paraveterinary workers is less homogeneous globally than that of a vet, and qualification levels, and the associated skill mix, vary widely.

### Allied professions

A number of professions exist within the scope of veterinary medicine, but may not necessarily be performed by vets or veterinary nurses. This includes those performing roles which are also found in human medicine, such as practitioners dealing with musculoskeletal disorders, including osteopaths, chiropractors, and physiotherapists.
Some roles are specific to animals, but which have parallels in human society, such as animal grooming and animal massage. Some roles are specific to a species or group of animals, such as farriers, who are involved in the shoeing of horses, and in many cases have a major role to play in ensuring the medical fitness of horses.

## Veterinary research

Veterinary research includes prevention, control, diagnosis, and treatment of diseases of animals, and basic biology, welfare, and care of animals. Veterinary research transcends species boundaries and includes the study of spontaneously occurring and experimentally induced models of both human and animal diseases and research at human-animal interfaces, such as food safety, wildlife and ecosystem health, zoonotic diseases, and public policy. By value the most important Animal Health pharmaceutical supplier worldwide is by far Zoetis (United States).

### Clinical veterinary research

As in medicine, randomized controlled trials also are fundamental in veterinary medicine to establish the effectiveness of a treatment. Clinical veterinary research is far behind human medical research, though, with fewer randomized controlled trials, that have a lower quality and are mostly focused on research animals. Possible improvement consists in creation of networks for inclusion of private veterinary practices in randomized controlled trials. Although the FDA approves drugs for use in humans, the FDA keeps a separate "Green Book", which lists drugs approved specifically for veterinary medicine (about half of which are separately approved for use in humans).
No studies exist on the effect of community animal health services on improving household wealth and the health status of low-income farmers.
The first recorded use of regenerative stem-cell therapy to treat lesions in a wild animal occurred in 2011 in Brazil. On that occasion, the Zoo Brasília [pt] used stem cells to treat a maned wolf who had been run over by a car, which was later returned, fully recovered, to nature.