Have you seen the movie, "The Horse Boy"?
preview on youtube:
The true story of how the highly educated and somewhat unconventional parents of a profoundly classically autistic little boy inadvertently discovered how horses help relax and settle the child. They took that notion with them on a trip to Mongolia where they sought out the healing energy from traditional Mongolian Shamans. By no means was the child cured of autism. Frankly I don't think that would be a good thing if that were even possible. But the child's most debilitating and restrictive aspects of his autism did improve quite significantly.
I should mention that the film is a documentary using real live footage all the way through. The film also includes some commentary from Temple Grandin and Simon Baron Cohen. I cannot remember when I have seen such a great documentary.
http://www.amazon.com/The-Horse-Boy-Simon-Baron-Cohen/dp/B003TVQA4M
I should also mention that the film is available on NETFLIX and amazon instant video online streaming:
http://www.amazon.com/The-Horse-Boy-Simon-Baron-Cohen/dp/B003TVQA4M