Dot and stripes

Dotty was a little white horse
alone in a herd of Zebra
she wanted to be accepted of course
and roam with them on the savannah

But Dotty lacked the deep black stripe
to mingle with the herd
they said she wasn't quite the type
they said she looked absurd

But one day it hit her with a smack
the answer lay in the wallow
she painted mud stripes across her back
and the herd finally let her follow