How do cows eat grass without being sick?

Cows have a specialized digestive system that allows them to efficiently process grass. They are ruminants, meaning they have a four-chambered stomach that ferments the grass before digestion. The first chamber, the rumen, contains bacteria and enzymes that break down tough plant fibers, allowing cows to extract nutrients. This adaptation helps them digest grass without getting sick, as the fermentation process also neutralizes potentially harmful substances.