Bachelor's in Animal Science.. Can I become a nurse without taking getting another Bachelor's Degree?

I'm a recent graduate with a 3.0 in Animal Science (pre-vet).. I looked at alot of the sample questions on the test to become a certified nurse, and I'm really considering become a nurse instead of a vet tech for many obvious and not-so-obvious reasons. I have great people skills, and I really enjoy doing lab work and I think nursing is something I could see myself doing as a career. I know most programs require a Bachelor's in Nursing.. But is there any way I can take a few extra classes and complete a Bachelor's in Nursing that way.. Or do I have to start all over again? Thanks!