The services provided by veterinarians affect several different areas. Public health, agriculture, and human companionship are served by this highly specialized industry. In order to open a practicing veterinary clinic or hospital, a licensed Doctor of Veterinary Medicine must be employed.

In the United States, approximately 67% of veterinarians are engaged in private or corporate clinical practice. Other veterinarians limit their practice to the care of farm/ranch animals and advise owners on the best approaches to production medicine. Some veterinarians treat horses exclusively, and others treat combinations of species. Although a majority of veterinary professionals focus on basic services for companion animals, a large variety exists in terms of specialization by procedures. This includes treatments for cancer, dental care, and animal transplants.

Clinics servicing smaller companion animals have begun to sell over the counter drugs and other animal care products in addition to offering traditional veterinary services. The pet population has increased significantly, maintaining steady demand for veterinary services. Although the market largely consists of smaller independent operations, a clear industry leader exists. VCA Antech, Inc. boasts of a network of over 300 animal hospitals throughout the United States.