Just going to give you an idea of what you'd need to get in first round
University Veterinary Studies Courses:
NSW: University of Sydney - Camperdown/Darlington Campus & Charles Sturt University; Wagga Wagga
Victoria: University of Melbourne - Parkville Campus.
WA: Murdoch University - Murdoch Campus.
Queensland: James Cooke University - Townsville.
Here are some of the requirements -
Queensland: Sound Achievement or higher in Queensland Year 12 (or equivalent in other States) prerequisite subjects English, Chemistry, Maths 1/B & Physics.
Victoria: VCE or Australian Year 12 equivalent. Units 3 and 4. A study score of at least 35 in each of English, Chemistry, and one of Mathematics or Physics.
New South Wales: Applications are judged on performance in the 2004 HSCE will be ranked on their scaled aggregate University Admission Index. The University of Sydney will select Year 12 students solely on their UAI. The minimum aggregates required for HECS entry for the past three years were as follows: 98.2 (UAI)
Western Australia (Murdoch): Admission requirements are successful completion of secondary education with Physics (and/or Biology), Chemistry and Discrete Maths.
Well Melbourne for the most part prefers people who've done a year of science anyways
http://www.vet.unimelb.edu.au/undergrad/local_entry.html
you can of course get accepted straight away if you happen upon a UAI of 99.1 as you do...
For Sydney
- 2007 - 98.4 or there round abouts
It also accepts people who've done a year of science and when they consider they take into account other work such as volunteering, working with animals... lots of it
http://www.vetsci.usyd.edu.au/future_students/undergraduate/requirements_bvsc.shtml
Murdoch
Mature age applicants who have previously studied at university are encouraged to apply and must submit a 500 word typed statement and show evidence that they have undertaken relevant work experience.
Mature-age applicants must also demonstrate competence in English. In addition, those mature-age applicants who are not taking the TEE should submit a supporting personal statement and curriculum vitae.
http://www.vetbiomed.murdoch.edu.au/vet/vet_admission.html
http://www.uq.edu.au/study/program.html?acad_prog=2036
http://isc-jaine.jcu.edu.au/reports/rwservlet
I know for a fact that the full-fee paying places have a much lower cut off 93.8, so if you're confident you could take a gamble and see if you could switch over to a CSP place later.
But yes the general consensus is do a year of science and then transfer across, just remember to ace it okay, and get a nice animal loving resume