Service to humans isn’t just for the dogs.  Mini horses can do the same work and live decades longer than dogs.  Minis can easily live beyond 40-years-old.  Check out the mini, Magic, who was named the Most Heroic Animal in America: http://www.horse-therapy.org/Hero.htm.  She has helped an elderly woman speak for the first time in  three years; helped a dying man pass gently; and was there to help a man who awoke from a coma as she entered his room.

Photo of “Magic” from Gentle Carousel Horses