I just thought I'd point out this website: www.uoguelph.ca/~fvc
Yes, it's a Canadian University based club, but you can get some good suggestions there, and the mesage board sometimes gets people who aren't interested specifically in the Ontario Vet College.
I'm surprised to hear you're having a hard time finding a vet clinic to volunteer at... there may be something in how you're going about it.
Personally, I started at a large hospital in Ottawa doing a Job Shadow day in grade 9 - then I volunteered there every weekend, until one of the founding partners felt I was too young (14) and was nervous about something happening to me.
Once I hit 16 I hit the market, and found a small, one doctor practice. This place is exceptionally understaffed more often then not and what they need volunteers for is to keep the place clean. What you have to realize it that no matter where you volunteer, that's going to be your first responsability: cleaning. Sweeping, mopping, washign dishes, cleaning cages, etc. If you stick with it and show you are responsible and reliable you may be invited to help with more "hands on" tasks - lab work, restraining, etc. Also, when I applied at this particular hospital, I submitted a resume with a cover letter indicating I wished to volunteer there. This professional approach impressed them.
After a couple years, I did my high school co-op term at that same hospital, and within a month of begining that I was hired there. I worked there until I moved here to Guelph
Now, Ottawa has a lot of vet clinics, and is more of a human medicine university town. Guelph, on the other hand, is oversaturated with wannabe vets, so getting a volunteer position here was tough. However, there are always places that are always in need: i volunteered in the Large Animal Hospital in the Neoatal Intensive Care Unit (they need people 24 hours a day, 7 days a week - so even if you have no experience, they'll take you!) and now I also volunteer at the Humane Society, which is rewarding and beneficial (my supervisor is a vet!)
I'm nto familiar with the school you're planning to attend, but it's never to early to look into the application process and to keep itin mind when trying to gain experience. The Ontario Vet College requires 3 references, and it is now stressed that 2 of them really should be from veterinarians. Also, from speaking with staff at the OVC I know that they look for more then just good marks and animal experience. They want well rounded people, they want people who "don't have blinders on" They want people who have experienced more then one aspect of the veterinary profession (it's not just small animal practice!). They want people who have people skills (i.e. even volunteering somewhere that doesn't involve animals at all, but shows great people or business or SOMETHING skills, is a plus)
If this is what you really want, stick with it and don't let other people get you down. If you're attending a "pre-vet" university you'll be immersed in competitiveness from day 1 - I know I was, attending the University of Guelph. I've chosen to finish a BSc before applying to vet school, and I've been condescended on by people who apply as early as they can (after 2 or 3 years) and feel I must not *really* want to be a vet. (and I do - I just want something to fall back on in case I don't get in. 300+ people apply every year, and they only take about 100)
Best of luck
.maggie (incidently, president of the Future Vets Club