Each school has different requirements for admission, including GPA, GRE, pre-requisite classes, and experience. You'll have to check the stats for the schools you may be interested in to get a better idea. As for whether or not it's harder to get into vet school than med school.. Think about it. There are 28 vet schools in the US, whereas there are 125 MD-granting schools and 20 DO schools. I don't know what the pre-req's for med school are, but just by shear statistics, you've got a lot better chance of getting in med school than of getting into vet school.