I'm just finishing up second year at WCVM. Our class is actually the first class in which a brand new curriculum was implemented. The new curriculum is a core-elective program. That means that for the first two years, we all take the exact same courses (first year: anatomy, physiology etc, second year: pathology, microbiology, virology etc). The fun comes in third year, when we get to take electives that we choose. I'm not quite sure how it's going to work yet, as there still are required "core" courses in third year as well (large animal and small animal medicine and surgery, etc), but in addition to those, we get the option of taking relevant courses that we're interested in. For example, there are elective courses in advanced small animal radiology, bovine procedures, small animal nutrition, equine surgery, etc. That gives us the option of "streamlining" our curriculum a little in 3rd year. I know there is a core exotics medicine/surgery course in 3rd year, but I'm not sure if there will be an exotics elective as well.
The 4th year is our clinical year, where we spend the whole year doing rotations at the teaching hospital at WCVM. There are a few external rotations that we can take, and you can do externships, but most of the rotations are at the college. There is the ability to pick and choose which rotations you want to take as well, although there are a few core rotations (like large animal surgery/medicine, small animal surgery/medicine, anesthesiology, etc).
So basically, for the first 3 and a half-ish years, you focus pretty evenly on small and large animals, and then after that you do have the option to pick courses/rotations that are in your area of interest, to some degree.
Hope this helps, let me know if you have any other questions.