What is a ruminant?

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A ruminant is a mammal that digests plant-based food by initially softening it within the animal's first compartment of the stomach, principally through bacterial actions, then regurgitating the semi-digested mass, now known as cud , and chewing it again. The process of re-chewing the cud to further break down plant matter and stimulate digestion is called "ruminating." There are about 150 species of ruminants, which include both domestic and wild species. Ruminating mammals include cattle, goats, sheep, and bison.