The core science majors that lead to veterinary school

Most students who become veterinarians major in biology, chemistry, or animal science as undergraduates. Veterinary schools do not require a specific major—they require specific courses. You can major in English or business and still go to veterinary school if you complete the prerequisite science classes. That said, biology and chemistry majors align naturally with those prerequisites, so they are the most common paths.

The prerequisite courses you must take are nearly identical across veterinary schools: general biology with lab, organic chemistry with lab, inorganic chemistry with lab, biochemistry, physics with lab, and often microbiology or genetics. A biology major covers most of these in the major itself. A chemistry major covers chemistry deeply but requires you to add biology courses outside the major. Animal science majors, offered at land-grant universities, bundle animal-focused courses with the chemistry and biology you need.

Key Takeaways

  • Biology, chemistry, and animal science are the three most common majors for students entering veterinary school, but the major itself matters less than completing required prerequisite courses.
  • Every veterinary school requires general biology, organic chemistry, inorganic chemistry, biochemistry, and physics—all with lab components—regardless of your major.
  • You can major in any subject and still attend veterinary school as long as you complete the prerequisite science courses, though this requires careful planning outside your major.
  • Veterinary schools also evaluate your GPA in prerequisite courses separately from your overall GPA, so performance in science classes carries extra weight in admissions.
  • Animal science majors, available mainly at state universities, let you study animal-related topics while fulfilling chemistry and biology requirements in one program.

Why biology is the most straightforward path

A biology major naturally includes most veterinary prerequisites within the major itself. You take general biology, organic chemistry, biochemistry, and often microbiology or genetics as part of the major requirements. This means you spend less time hunting for electives that fit prerequisites and more time on upper-level biology courses that deepen your understanding of animal systems, ecology, and physiology.

The downside is that a biology major can feel broad. You may study plant biology, marine biology, or molecular biology alongside animal-focused courses. If you want to concentrate on animals from day one, you might feel like you are taking courses that do not directly serve your goal. However, veterinary schools value the breadth—understanding how different organisms work makes you a stronger applicant than studying only animals.

Chemistry majors and the extra planning required

A chemistry major gives you deep informed in organic and inorganic chemistry, which is valuable for understanding pharmacology and drug interactions in veterinary medicine. However, chemistry majors must add biology courses outside the major to meet veterinary prerequisites. You will need to take general biology, microbiology, and possibly genetics as electives or minor courses.

This path works well if you are strong in chemistry and want to specialize in that area, but it requires you to map out your four years carefully. You cannot assume your major will cover everything. Meet with an academic advisor before you declare the major and confirm which biology courses you still need to take.

Animal science: a specialized option at land-grant universities

Animal science majors, offered at universities with agricultural programs (usually state universities), combine animal-focused coursework with the chemistry and biology you need for veterinary school. You study animal nutrition, animal genetics, livestock production, and animal behavior alongside organic chemistry, biochemistry, and biology. This major is ideal if you want to study animals throughout your undergraduate years and still meet all veterinary prerequisites.

The trade-off is availability. Animal science programs exist mainly at land-grant universities and agricultural schools. If you attend a smaller college or university without an agricultural program, this major will not be an option. Additionally, some veterinary schools weight animal science majors differently in admissions—a few value the animal-specific knowledge highly, while others view it as less rigorous than pure biology or chemistry. Check the admissions pages of schools you are considering before committing to this major.

How your major affects veterinary school admissions

Veterinary schools care most about your performance in prerequisite science courses, not your major itself. They calculate a separate GPA for prerequisite courses and often weight it more heavily than your overall GPA. A student with a 3.5 overall GPA but a 3.2 in prerequisites will be viewed differently than a student with a 3.2 overall GPA and a 3.8 in prerequisites.

Your major becomes relevant only if it signals strength in science or if it shows you have thought carefully about your path to veterinary medicine. A biology major with a 3.8 in prerequisites and a 3.5 overall GPA looks strong. An animal science major with the same numbers looks equally strong. A philosophy major with the same numbers also looks equally strong—the major does not matter if the prerequisites are solid.

Minors and double majors: when they help and when they do not

A minor in animal science, business, or chemistry can strengthen your process if it shows depth in an area relevant to veterinary medicine. A minor in animal science demonstrates sustained interest in animals beyond your major. A minor in business or chemistry shows you are thinking about the business side of veterinary practice or the chemistry underlying pharmacology. However, a minor is not required and will not make up for weak prerequisite grades.

Double majors are rarely necessary and often make your schedule harder without improving your veterinary school chances. If you are considering a double major, ask yourself whether the second major strengthens your process or straightforward fills your schedule. A biology major with a strong GPA and solid veterinary experience (shadowing, volunteer work at shelters or clinics) will be more competitive than a biology and chemistry double major with a lower GPA.

Planning your major if you are unsure about veterinary medicine

If you are interested in veterinary medicine but not certain, choose a major that keeps your options open. Biology and chemistry majors lead to careers in research, public health, pharmaceutical development, and many other fields if you decide veterinary medicine is not for you. Animal science is more specialized—if you leave the veterinary path, your major is less directly useful in other fields, though it can lead to careers in animal nutrition, livestock management, or agricultural science.

You do not need to declare your major when ready. Most universities allow you to explore during your first year. Take general biology and chemistry in your first year, do well, and then decide whether to pursue biology, chemistry, or animal science based on which courses you enjoyed and where your strengths lie.

Frequently Asked Questions

Can I major in something other than biology or chemistry and still go to veterinary school?

Yes. You can major in any subject as long as you complete all prerequisite courses—general biology, organic chemistry, inorganic chemistry, biochemistry, physics, and often microbiology or genetics. You will need to take these courses outside your major, which requires careful planning. Check your university's course catalog and meet with an advisor to map out a four-year schedule that fits both your major and the prerequisites.

Do veterinary schools prefer one major over another?

No. Veterinary schools care about your performance in prerequisite courses, not your major. A biology major, chemistry major, and animal science major with identical prerequisite GPAs and veterinary experience are equally competitive. Choose the major that aligns with your interests and strengths, not the one you think sounds best to admissions committees.

What if I am not good at chemistry?

Chemistry is a required prerequisite, so you will need to take it regardless of your major. If chemistry is difficult for you, take it seriously—get tutoring, form study groups, and give yourself time to understand the material. Veterinary schools see your chemistry grades, and struggling in chemistry signals that you may struggle in veterinary school, where pharmacology and drug interactions are central. That said, many successful veterinarians found chemistry challenging as undergraduates and improved through effort.

Should I minor in animal science if I am a biology major?

A minor in animal science can show sustained interest in animals, but it is not necessary for veterinary school admissions. If adding a minor means your GPA drops or you have less time for veterinary experience (shadowing, volunteer work), skip the minor and focus on strong grades and hands-on experience instead. Veterinary schools value what you have done with animals more than what you have studied about them.

What if my university does not offer animal science?

Choose biology or chemistry based on your strengths. Both majors prepare you equally well for veterinary school. You can supplement with animal-focused electives—wildlife biology, animal behavior, animal physiology—if your university offers them. Your veterinary experience outside the classroom (shadowing veterinarians, volunteering at shelters or clinics) will matter more than your specific major.