First of all, I have a question. Are you actually DONE, or do you have 40 units left to go? (Because from what I understand, 40 units is still quite a bit of work). And as far as your question, I purposely got my B.S. before I would have been admitted to Vet School. (I had one semester to go when I first applied, therefore I had graduated before matriculation would have begun, but unfortunately I was not admitted). I think it is important to get the breadth of education that people receive by the time they get a 4 year degree, before applying to vet school, whether or not you actually receive the degree. (Does that make sense?) My point being, if you take classes (assuming full time) for 3-4 years then apply to vet school, you are going to have a very well rounded education, whatever your major may be. That quality is what the adcoms are looking for. You will not only have completed all the pre-reqs, but also have had the opportunity to take several upper-divisions in your major as well as biology courses. It states on several vet school websites that it is "not required" but looked highly upon that applicants take other courses such as embryology, phsyiology, bacteriology, histology, etc. These are the courses that you will take in your 3rd and 4th years as an undergrad. That being said, I think it is very valuable to invest your time in the education. I completely understand your want to go out into the field and do conservation work (I think that is what you stated), but you will have time to do that; whether it be when you're done with college and waiting to get into school, or when you're actually a vet and practicing. Don't get me wrong, experience is just as much a part of the application process as education, but when you look at the statistics of who gets in without a degree, the numbers are astonishing. 😳
At least this time, all I'm doing is some light mouse work and very little lab work, so it's all good. Still, it would have been cool to be called Doctor before graduating with everyone else. 
