To become a veterinarian in the United States, you must first complete a four-year degree before attending veterinary school, which also takes four years. It is important to study biological science to prepare for vet school. In addition, you will need to pass the Graduate Record Examination (GRE) and obtain a state license after completing your Doctor of Veterinary Medicine (DVM) or Veterinary Medical Doctor (VMD) degree. Internships and residency programs are also necessary to gain hands-on experience and specialized training in the field. These programs are typically 3 to 4 years long and offer in-depth professional training and experience. Some residency programs may also offer a Master of Specialized Veterinary Medicine degree.