buddies, horse and bird

When you are tense, what do you do to relax? Do you play a video game? How about taking a walk with your dog? Or maybe you can lie back on the cool grass and watch the clouds go by. If you were a horse, what would calm you down? As strange as this might seem, some people put birds in the pasture with their horses. The birds sit quietly on the animal's backs and it seems to relax the horses. Both creatures appear to like each other's company the horse does not buck or gallop off when a bird lands on its back.