Army Medicine | Flickr. To get into veterinary school, students will need to complete an undergraduate education, typically lasting 4 years. They must then take the GRE, or Graduate Record Examination, and apply to veterinary school with their scores.n average, it takes about 8 years after high school to become an entry-level veterinarian. Undergraduate Coursework. The bachelor’s degree is the most common qualification held by veterinary school applicants, but some students have master’s and doctoral degrees.