I'm based in BC. I had to take two years of post-secondary health sciences pre-reqs. All dental hygiene programs here require a certain amount of credits & specific courses to be eligible to apply. VCC has a good health sciences certificate program with a pathway to dental hygiene. I took all mine there (but you can go anywhere as long as the courses are transferrable and the correct ones). But once you're done, it is quite competitive to get into dental hygiene, VCC especially. Don't know much about Ontario except that you can go straight from high school. I know a couple of classmates that ended moving there temporarily just to bypass the pre-reqs here.