What distinguishes the pronghorn's feeding strategy from pure grazers like some bison populations?

Answer

The pronghorn actively seeks out leafy, herbaceous material when it is plentiful

The active selection for nutrient-dense forbs, which are generally more palatable than grass, sets the pronghorn apart from herbivores that rely almost entirely on grass consumption.

What distinguishes the pronghorn's feeding strategy from pure grazers like some bison populations?
fooddietanimalherbivorepronghorn