How Many Stomachs Does a Cow Really Have?

A cow has four stomach compartments: the rumen, reticulum, omasum, and abomasum. They work together to break down tough grass.

Four. A cow's stomach has four chambers, which is why cows are called ruminants and chew the cud.

The four chambers let a cow ferment and re-digest fibrous plants like grass and hay that a single stomach could not break down efficiently.