Yes, zebras are the most well-known striped equine, but donkeys, mules, and even horses can be striped to some degree. Archeologists have unearthed the remains of a tiny mammal, Eohippus, that it the forerunner of the modem equine. But bones cannot tell us what the coat and fur of the animal might have looked like.
Stripes are one of the main defenses of the zebra.
In a group, the moving black and white pattern of stripes breaks up the outlines of each animal and makes it nearly impossible to single out any one individual. However, the striping patterns of zebras are known to become sparser and less distinct the further south the population range extends. The now extinct True Burchells, and extinct Cape Quagga, the furthest South of the sub-types, were so sparsely striped that only the head and neck were distinctly marked. The legs were virtually unmarked, and the pattern was broken and vague along the topline. Striping, to an extent, is also found on the ass breeds, as well as modem horses.