short version: i did have SA clinical experience despite only wanting to work with horses.
real version: i had asked my pre-professional advisor if i *had* to do SA stuff before applying (cause i so desparately wanted to avoid it if at all possible). her answer was pretty much 'yes.' i think it came from the point of view of adcoms wanting to see a well-rounded applicant, and even if i had had years of extensive veterinary equine experience worthy of getting me in anyway, she still would have said that i needed the SA stuff. so, i went out and got me a part time tech job at a really small SA clinic near school for a year before apps.
my opinion: while i think it would be possible to work as an equine vet tech, horse handler/trainer/competitor/barn manager for several thousand hours and get accepted without the SA, i think it would be a risk not many would take. seeing as much of vet school itself is focused on SA clinical settings, i think that they want you to know what you're getting into for the next four years even if its not how you want to spend the rest of your life.
are there any successful applicants here who did *not* have any SA experience? and i don't mean 'oh i volunteered at a shelter for two years, but other than that, no.' really... no experience other than your own pets?