what cow doesn't eat grass?

cowboy

Sea Cows dont eat grass. (the steller's sea cow is a extinct mammal related to the modern day manatee) all true cows eat grass.

Sea Cow.

a vegatarian cow LOL , cause you know, for a cow to be like that, it only eats meat.

a woman who might as well be a cow? lol

straight answer: baby calf.

out-of-the-box: sea cow, dead cow, fake cow, sick cow with foot+mouth in UK

Seacows

A dead cow.

a brown cow, A.K.A. rootbeer float.

Gerry's mother!

because the are hungry and it is easy to eat