From my experience at Guelph (home of OVC, one of three vet colleges in Canada), I believe it is:
One year minimum of university before applying to vet school. Many students don't get in at first and take 2,3 or 4 years before getting into vet college.
One year 'Pre-Vet'
Four more years (including an externship) until they graduate with a DVM.
I may be inaccurate though.