Bison eat and digest their food in a very unique way. They like to eat prairie grasses, and they have special teeth on their lower jaw that helps them clip off the grass. Bison eat grass by wrapping their tongue around it and pinching it off between their tongues and lower teeth. They swallow their food practically whole.
Bison are ruminants.
Ruminants have stomachs made up of four compartments which help them digest food. When eaten, food is first stored in the rumen , the first compartment of the stomach. Some food goes directly to the second compartment which is the reticulum. Eventually, all the food goes to the second compartment, the reticulum . Here stomach juices and bacteria begin to break food down and form it into cud.