ABERDEEN, S.D., Aug. 19 -- Bemidji State University issued the following news release:

Dr. Angela Fournier (left) with Tracker; Liz Letson (right) with former racehorse Sonic and Tilly the donkey.Just a few miles north of Bemidji State University, at Eagle Vista Ranch and Wellness Center near the shores of Little Turtle Lake, a horse and the human who has entered its space are making decisions about how the next few minutes will unfold.

Does the horse approach with trust or fall back with caution? If the horse approaches, will the human welcome it or nervously back away? Will the pair seem to form a quick bond, or keep each other at a distance until the time comes for the human to depart?

Dr. Angela Fournier, professor of psychology at B...