You know, When I went to uni I had a lot of strong views on animal ethics and am against unnecessary animal testing etc, unsuitable zoo enclosures etc as well as being a staunch anti as far as the foxes are concerned, however when you learn indepth about animal research at vet school, which certainly at liverpool you don't have to do, you learn that actually its not all bad and how it actually benefits animals.
Also, as vets our usual first exposure to semi cruelty caused by domestication isn't as far afield as in zoos-look at keeping pets in homes and horses in stables and how commonly it effects them behaviourally.
Although I don't want this thread to go all political and i don't want you to all backlash and blather on about animal testing or other issues whichever side you're all on,
I think its useful for you to know that you're opinions may change when you see all sides of these sorts of debates, learn where food comes from, how things die, what hurts and what doesn't, what animals think etc, and thats one of the privelages of vet school- that you on the whole get to know the facts. Its certainly helped me to make more informed descisions than 4 years ago. We're so lucky to be able to learn more about animal issues than the general public! So keep an open mind. I haven't compromised what i believe but I can see most sides and why things have to be the way they are sometimes.
As for debating (not arguing!!) in interviews, it stands you in good stead that you can stand your ground eloquently and i think interviewers like it.