I did a month-long study abroad in South Africa with Ecolife Expeditions. It was a month of pretty extensive small animal and wildlife/game animal veterinary experience, and I believe that it really helped my app stand out (as well as added variation!!). My program wasn't cheap, but as I was already planning on completing some sort of study abroad program, the month-long option ended up being a little less expensive (combined with a semester long tuition at my "home" school) than a complete semester abroad. Plus, it was pretty freaking awesome.
I LOVE traveling and I thought the program was completely worth it. I even used some of my experiences in my personal statement, and I thought having a world-view was something that definitely added to my personal depth as well as my veterinary education. However, to echo Fireflysushi, if animal experience/vet experience abroad is something you can't afford or justify spending money, there are tons of options for unusual veterinary experiences if you keep your eyes open. Check around for wildlife centers/rehabs, zoo internships (I have a friend who has an awesome undergrad internship at the Denver Zoo), whatever you can get your hands on.
Additionally, my school gave me 2 partial scholarships to attend my program, so don't pass that up. If you have the grades and are willing to troll around your school's study abroad website/program/etc, there are lots of options for financing a trip abroad.