It depends on the school. Some look at your most recent, others at the best. GRE isn't a huge part of admissions, it's mostly getting you in the door for the interview. I think they said at MSU, all told GPA and GRE amount to about 10% of the admissions process. I think the average score of those admitted at MSU is typically around 1170. Average GPA was 3.54, so you're not far off. It's always helpful to get the scores up if you can, but if it's between riding out with a vet for experience and studying for the GRE....I would take the experience.