The term 'CHEWED FOOD TWICE' can be summarized as 'CUD', which is an acronym for 'chewed food twice'. CUD is a term used to describe the process of an animal regurgitating and re-chewing its food. This behavior is most commonly seen in cows, sheep, and goats, who are all ruminants. Ruminants have a four-chambered stomach that allows them to digest their food more efficiently. The CUD-chewing process helps break down the food further, allowing the animal to extract more nutrients from it.