Which group includes the animals cow, sheep, and goats?

• A. Omnivores
• B. Nonruminants
• C. Monogastric animals
• D. Ruminant animals

Answer: (D)

Ruminant digestion is the concept at play. Cows, sheep, and goats have a four-chambered stomach and rely on microbial fermentation to break down fibrous plant material. They chew cud, which reprocesses food to maximize microbial access to cellulose. The rumen and accompanying compartments host bacteria and other microbes that convert fibrous carbohydrates into volatile fatty acids, providing most of their energy from plants like grasses and hay. This system distinguishes them from monogastric animals, which have a single-stomach setup and don’t rely on rumen-based fermentation, and from nonruminants that don’t use this four-chambered fermentation strategy. They are best described as ruminant animals.