I Want to be a Veternarian, what major should I choose...?

If you are planning on attending vet school, it probably doesn't matter - take whatever interests you. Just make sure you take the necessary courses for admission. Check the websites of a couple vet schools you may be interested in to see what they require. If your major doesn't require some intro biology, chemistry, and physics, you'll probably have to take those courses to get admitted.

Also, keep in mind that vet school is extremely competitive. Keep your grades up.