CSU has a very low cutoff, maybe less than 90. The rural universities tend to have lower cutoffs because they have difficulty getting good staff and the better students usually choose cities where they have grown up and have more options to find work/spend time with family... whilst they are at uni.
*Ahem* I take offence at your comment that the 'better students' choose the city universities. I got the marks to go to Sydney. I chose not to go. Wanna know why? After speaking to a mate who had just finished first year at sydney, one comment which really stood out was "We got to spend a WHOLE DAY out at the farm in Camden, and we got to WATCH the lecturers put the cows in the crushes, and take their temperature! It was SOOO COOOOL!!!". At CSU, you don't simply WATCH the lecturers. You're in there getting your hands dirty from day one, being taught how to handle the animals safely and confidently.
In answer to the OP's original question, the cut off mark is 85 for students who have completed their schooling in rural areas, and 90 for those from city areas. This discrepency is a reflection of the fact that: 1) Students from rural areas are unlikely to have had the same access to educational resources as those from cities, 2) people from cities are more likely to want to return to the city to work after graduating (CSU aims to fill the demand for RURAL vets). BUT, the selection process is based more on the questionnaire, and interview (Assuming you are selected for one. It is a very competitive process - in the year I applied, about 500 students applied, and only 100 of us got interviews. Of that 100, only 50 of us were offered a place). And getting a higher mark does NOT necessarily mean you are more likely to get in - but you DO want to aim as high as possible (will be handy for scholarships too).
And this:
Vet work is quite limited on farm animals and they are often culled because it isn't worth paying to treat them or the treatment may prevent them being used for meat/milk/eggs. Agricultural science is another option with higher graduate wages than vets and probably less weekend/on call work plus a few less years at uni.
is the biggest load of bollocks I've heard in a while. No doubt written by someone who has little to no understanding of how Australian agriculture works. There are MANY opportunities for vets to work with large animals. The only difference is that as most livestock are a source of income for producers, there is a finite amount of money which can be spent on any individual animal. But this doesn't mean that the producers don't get the vet out. It just means you have to be creative with the budget you have. Makes you better at problem solving I think.
If you want to do vet - then by all means go ahead and achieve that dream. I'm almost half way through vet at CSU, and although there are times when it seems althogether too hard, I wouldn't have it any other way. There's something good about knowing you are doing exactly what you were put on this earth to do
But that said - it will CERTAINLY not be a walk in the park. It is 6 years of hell. And you might come out the other side of it and be able to get a job. You WILL graduate at least $70,000 in debt (not including accommodation), and will be looking at a graduate salary of about 30-40k. But Iguess it all comes down to what you want to get out of life. The world is your oyster - choose wisely
(Although: the comment about ag science being a shorter course with likely a better graduate pay is probably pretty correct. I'd definately reccommend you look at the CSU course if you take this option).