wishing you all a
Okay, I believe I found out. The general wikipedia page about Equidae mentions they were "herbivorous browsers" with no explanation what that is but apparently
A browser is a type of a herbivorous animal that specializes in eating leaves, fruits of high-growing woody plants, soft shoots and shrubs.
Source: https://www.differencebetween.net/science/nature/difference-between-browser-and-grazer/