In reading from the book, Making Gospel Sense; To a Troubled Church, by James Wm. McClendon, Jr. I found this fascinating depiction.
". . . an old saying from the American West: What is the difference between wild horses and wild asses? When danger threatens the herd, wild horses gather in a circle, heads together , and kick out against the common foe. In similar circumstances , wild asses (so goes the saying) gather in a circle, heads out, put their hind quarters together - and kick against each other!" (Pilgrim Press, Cleveland, OH. 1995. From the introduction, xiii & xiv.)