Cows, along with sheep, goats, deer, antelope, bison, buffalo, moose, elk, and reindeer, are all ruminants. These are mammals with four compartments in their digestive system that let them re-chew and ...

At first glance, cow digestion seems unremarkable: a bit of grass, chewing cud–done. But behind this seemingly simple process lies a highly complex system full of surprises. What happens inside a cow ...