Yes, horses seems to be very therapeutic for people. My sister is a veterinary and has always loved horses and now owns and cares for three horses. She lives a very stressful lives with several employees, two small kids. And every time she comes from having spent time in the stable caring for horses she looks renewd.
I used to be scared of horses when I was a kid after an incident with riding one. But now I love their company, they are so cool and composed.