While in high school, you should pay attention to your performance in science courses such as Chemistry, Biology, and Physics. Also pay attention to math courses, such as Trigonometry, Geometry, and other courses used in science classes.
In the eastern United States, we have the University of Georgia:
The University of Georgia College of Veterinary Medicine, founded in 1946, is dedicated to training future veterinarians, providing services to animal owners and veterinarians, and conducting investigations to improve the health of animals as well as people.The college benefits pets and their owners, food-producing animals, and wildlife by offering the highest quality hospital and diagnostic laboratory services. Equipped with the most technologically advanced facilities located on a university campus, the college is dedicated to safeguarding public health by studying emerging infectious diseases that affect both animal and human health.
The College offers a doctorate in veterinary medicine and post-doctoral training of interns and residents.It also offers a college-wide interdisciplinary master’s degree in veterinary and biomedical sciences, a master's and a PhD in Veterinary and Biomedical Sciences, dual-degree programs such as the DVM-Masters of Public Health (DVM-MPH) and the Veterinary Medical Scientist Training (DVM-PhD) programs, as well as post-DVM master’s degrees in avian medicine and food animal medicine. Doctoral degree programs are offered in physiology, pharmacology, pathology, parasitology, and infectious diseases.
More details in: http://vet.uga.edu/aboutus
All the Best!