In order to qualify for admission to a veterinary school, you will need a BS in Biology, Chemistry, or both. Actually, it doesn’t matter what your official major is, but you will need to have completed all of the required biology and chemistry classes with a very high GPA. When friends of mine were applying to vet med schools years ago, they interviewed the top 7 percent of their applicants and admitted the top 3 percent. A friend of mine who completed her BS with a 3.8 was admitted. My understanding is that veterinary schools are more likely to admit in-state students or at least students who graduated from undergraduate progams in their state. They admit more students from some some undergraduate programs than others, so I would pick a couple of vet schools that you are most interested in and find out where their recently admitted students graduated from. They do release this information, so if you can’t find it on their website, ask the admissions office. You are not going to be able to study chemistry and biology via an online program, at least not with enough credibility for admission to a vet school, so you will have to attend a brick and mortar school. You’d do best to attend a school that vet schools are admitting their students from. Good luck!

You didn’t mention your state, so here’s a list of vet schools with links to each school: http://www.aavmc.org/students_admissions/vet_schools.htm

Vet schools are more competitive than med schools and the entrance requirments are almost identical.