She stands 16 hands, weighs one hundred stone.
Her dam is a daughter of the great horses
That carried the knights, of the line that
Hauled the coal and the guns and the beer.
Her sire, a son of the blood that George
Washington brought to America, by a
French jack from Poitou.
She is broke to ride, and to pull, and to pack

While her half sisters will bear champions
she will bear only burdens,
but she will bear her burdens
with style and humour, loyalty and grace, and
a wicked eye to self-preservation

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I place this in the "western" category reluctantly, there being none other that fit.