You're a high school student planning to become a vet. You know that you still have college between now and vet school, but you want to lay a firm foundation to help you get there. What courses should you be taking?
Vets need to have a good well-rounded education, and you're definitely going to need one to get into a good college and be able to take on collegiate-level work that will lead you on to vet school.
While you may want to pack as many science courses into your schedule as possible, biology and chemistry courses alone aren't going to prepare you for a future as a veterinarian. You will need to be able to communicate with your human clients as well as your non-human patients; that means that you would do well to take classes in or participate in extracurricular activities such as speech and debate.
Veterinarians need a good grasp of logic, and they also need to be able to deal with financial matters when necessary. Veterinary practices are, after all, businesses. That means that a good background in math will prove useful. If there are accounting courses offered, it would be wise to take at least one.
As mentioned above, veterinary practices are businesses. Keeping that in mind, it may be useful to take a few courses in business. If your school has an arrangement with a local community college or four-year college, you may want to take business courses there.
Choose the most rigorous courses that you can handle. However, don't make your course load all about your dream of becoming a veterinarian. Make room for other interests as well. Those other interests may surprise you and prove to be more relevant to your intended career path than you ever dreamed they would be.
Also, remember to look beyond your course schedule. Be certain to pursue extracurricular activities that are useful and interesting. However, don't pack your schedule with extracurricular activities just for the sake of trying to look good to a college. Choose your activities because you actually want to participate in them. Otherwise, you will just make yourself miserable.
Be certain to look beyond your school. Find volunteer activities to do that interest you and are relevant to your goal of becoming a veterinarian. One of the most obvious ones is, of course, volunteering at a local animal shelter.
Consider, also, some hands-on experience in the form of an internship. Your school should be able to help you arrange one. Consider options other than a veterinary practice for your internship; animal rescues, humane societies and farms can all over useful experience and look good on your college application.
Finally, remember that high school is just a small part of your life. Soon, you will be in college, and those experiences and courses that you encounter there will play a far greater role in being accepted into and succeeding at veterinary school.