I was accepted on a first application attempt with a 3.21 cumulative, but that was several years ago and my science and last 45 hours GPAs were both quite strong (3.7ish).
You can certainly make up for and get into vet school with a cumulative GPA that low, but a lot will depend on how the rest of your application looks—particularly your other GPAs—as well as which school(s) you’re aiming to apply to, as some care more about that cumulative GPA than others. A few, like Iowa State and Kansas State, don’t consider the cumulative GPA at all beyond ensuring that you meet the minimum to be eligible to apply.
Basically, we’d need much more information to really tell you where your chances lie.
It’s much easier to get in with a lower cumulative GPA if your science grades are generally good and/or you have a strong upward trend than if your GPAs are all lower across the board.