Definetly go for your dreams! It's always good to have a backup to fall back onto though. If you're almost done with school (senior year or smth), finish it so you can have an alternative if need be.
I wish I could just work with horses, but gee don't tell my parents! They want me to invent to cure for smth or at least smth along those lines... Luckily my husband is the most supportive person and he said I can do it once I finish school (almost done-yeay!) and if it all works out for me. He even wants to build our barn himself
That's just him though, always having to build things... I will go do some work according to my bachelor though, because that can also finanze my dream and once the stable is running well or my horse career is working well, then I can focus on it.
Just google "equine science" or "equestrian science". Mostly they only offer it as an Associates, but there are a few that actually offer it as major undergrad and even one grad (that I found so far)!
Either way good luck and let us know how it went!