I was just going to make it a comment to
this, and in particular to the comic provided by Danur. But I thought it was... worthy of its own lj post, thankyouverymuch. >D
"Zebras energetically defend both young and grown zebras of their group from predators. Hugo van Lawick saw wild dogs attack a zebra mother and foal. The wild dogs chased a group of about twenty zebras, despite being attacked by a stallion, until they managed to separate a mare, foal and yearling (probably the mare's previous foal). As the rest of the herd vanished over a hill, the pack surrounded these three zebras. Their principal target was the foal, but the mother and yearling kept them back. After a while the wild dogs began jumping at the mare, grabbing for her upper lip, a hold which nearly immobilises a zebra. Van Lawick thought the dogs would soon succeed and was astonished when he felt the ground shaking and looked up to see ten zebras thundering towards the scene. This herd galloped up, engulfed the three embattled zebras within its ranks and galloped away again. The wild dogs followed for only a short distance before giving up."
-Grahl (1987) in Masson & McCarthy (1996), 'When Elephants Weep'.