In the end, you may end up going full circle. I went to college as pre-vet, realized I didn't want to deal with pet owners. Went to graduate school in forensic science instead, got my masters, had to pay the bills and took a job as a lab tech, went back to school to get my masters in veterinary microbiology, and now work in regulatory affairs for veterinary vaccines. So I didn't become a veterinarian, but I still work in the field, but just took a round about way to get there.
And when I was in undergrad, I didn't even know the job I have now existed, yet I love the job I have.
However, if I had known sooner that the USDA has a plant genetics research lab at Living with the Land, I may have chosen a different career path to work at WDW