Rumination is a digestive process in which certain animals, such as cows, sheep, and deer, regurgitate and re-chew their food in order to further break it down and extract nutrients. This process involves a series of steps, including chewing, swallowing, regurgitating, re-chewing, and re-swallowing the food. Rumination allows these animals to more effectively digest plant material, which is often difficult to break down due to its high fiber content.
