What tools are used by cows while eating grass?
Cows do not use any tools to or whilst eating grass. They merely
use their powerful, rough tongue to grab a mouthful of grass, pull
it in their mouths, use their bottom incisors to shear the stems,
then force the grass to the back of their mouths where it is
swallowed whole. Occasionally a cow will chew on a mouthful of
grass, but only if she pauses to listen for an unusual noise, sniff
an odd scent on the breeze, and see where that scent or sound may
have come from.