There are some schools that focus primarily (or entirely) on science and last 45 GPAs --- ISU and KSU do for sure, and I know that that there are at least a few more. However, a lot of them still do have a minimum cumulative GPA that you have to meet in order for your application to be considered; ISU's is 2.5, which is I actually believe to be one of the lowest. Many schools won't even glance at your application if your cumulative GPA is below a 3.0.
I was accepted to a couple of schools with a 3.2 cumulative, and that's considered to be on the pretty low end. A 2.2 is going to make things extremely difficult for you and, honestly, I'm not sure that you're even going to qualify for most, if any, vet schools with a GPA like that.
Unfortunately, like Trilt alluded to, if you've got a lot of credits already under your belt, it may be practically impossible to raise your cumulative GPA beyond a few tenths of a point, even with straight As. You could potentially do a masters or retake any pre-reqs you did poorly in, but depending on how many credits are going into that 2.2, it might be too little too late.
Edit: Here's a calculator that may be useful to you: It can be used to determine just how high you can raise your GPA based on how many credits you've already taken and what courses you're currently in or have left to complete, as well as how many hours of As you'll need to raise your GPA to a certain level and whether or not that is going to be a realistic goal for you. For example, running it through that calculator, with 96 credit hours amassed, it would take 77 hours of straight As to raise a 2.2 to a 3.0.
Edit 2: Just realized that this got merged into the WaMC thread -- this is all in response to
@Katienic