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The term "nonruminant" refers to a mammal that is not a ruminant. Ruminants, such as cattle, sheep, and deer, are mammals that possess a specialized four-chambered stomach designed to digest tough plant materials like grasses and foliage. They achieve this by regurgitating partially digested food (cud) and chewing it again, a process called rumination.12

Nonruminants, in contrast, lack this complex digestive system. While they are also herbivores and consume plant matter, their digestive process differs. For example, horses and hippopotamuses are nonruminants with different digestive adaptations. Their stomachs are not divided into the four chambers characteristic of ruminants, and they do not ruminate.324

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