What key distinction defines the onager's successful foraging strategy compared to a domestic horse on rich meadow grass?

Answer

Processing high volumes of lower-quality, coarse dry matter

The onager is built to process high volumes of lower-quality, coarse dry matter, allowing it to occupy ecological niches unavailable to less adaptable equids.

What key distinction defines the onager's successful foraging strategy compared to a domestic horse on rich meadow grass?
dietanimalherbivoreOnager