Cattle belong to the bovine family. All domestic cows are descended from two kinds of oxen. Cows have hollow horns and come in a variety of colors. They feed on grains and grasses which they swallow whole and digest in several stomachs.

No, they don't. They have one stomach with multiple "compartments". Yes, it matters. :)

Cows at Becca's Workshop - and some examples of the lovely stuff to be found there: