Veterinary care and management are usually led by a veterinary physician (usually called a veterinarian, veterinary surgeon or "vet" - doctor of veterinary medicine or veterinary medical doctor). 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.