2026 YouScience Animal Science and Livestock Practice Test – Complete Exam Prep

A non-ruminant has a simple, single-chambered stomach and does not cud chew, so digestion relies mainly on enzymatic digestion in the stomach and intestines rather than microbial fermentation in a rumen. The pig fits this pattern: it has a monogastric (single-chamber) stomach and digests most of its feed without the cud-chewing and rumen fermentation seen in true ruminants. In contrast, cow, sheep, and goat are classic ruminants with four-chambered stomachs and cud-chewing behavior, relying on microbial fermentation in the rumen to break down fibrous plant material. So, the non-ruminant you can name is the pig.