this guy was just chillin'.
from wiki: Bison are herbivores and eat simple foods. The bison's main foodstuff is grass, though they will eat any available low-lying shrubbery[citation needed] as well as sedges. In the winter, bison forage for grass under the snow. If there is little grass available, they will eat the twigs of shrubs. Bison are notably better browsers than cattle, since cattle are more obligate grazers, even though wood bison have also been described as "obligate grazers". Wisent tend to browse on shrubs and low-hanging trees more often than do their cousins, the American bison. American bison prefer grass to shrubbery and trees.