I just graduated from Stephens College in Columbia, MO with a minor in Equestrian Science and I loved it. They have a wonderful equestrian program with a lot of great opportunities. You can get a degree in Equine Business Management, Equestrian Assisted Therapies or Equestrian Education. They also have a great Pre-Veterinary Medicine program now that works in conjunction with the University of Missouri-Columbia's Veterinary Program. You can earn Professional Association of Therapeutic Horsemanship International (PATH Intl.) certification and I believe the therapies concentration can be shaped around either mental health needs or physical health needs.
For the major I think you still have to take one riding course each semester and for the minor I only had to take three riding courses total. They offer Saddleseat, Huntseat, Western, and Reining.
The best thing about this school is their instructors also have a lot of real world experience and connections in the equestrian community so you can get hooked up with several incredible internships and jobs after graduation. I spent some time over the summer of 2010 in PA working for and having my horse trained by a World Champion Dressage rider, an opportunity I don't think I would have otherwise gotten without the help of my incredible Dressage instructor who was at Stephens at the time. There have been several girls who have gotten internships in the Saddleseat world at places like DeLovely.
One thing to remember, it's a small private all girls school but the campus is literally a few blocks from downtown Columbia and the University of Missouri campus and you have ample opportunities to take classes at Mizzou and be involved on their campus as well
I kinda miss Stephens if you can't tell hahaha