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.
Energy...
Eating grass
Cows make milk from eating grass.
Contaminated by what?
yes from eating so much grass
it is polluted as cows are eating grass which can be toxic in nature.
No. Cows are herbivores, meaning that they are strictly plant-eating animals, not omnivores nor carnivores. Cows eat grass, hay and silage and should eat just grass, hay and silage.
Cows would love eating the grass in the prairie.
A cow is a carnivore so it probly eats deer guts.
Cows
Yes, they have no problem eating dormant grass. As a matter of fact, most native grass species thrive best when they are grazed in their dormancy stage by cattle and other herbivores.
No. Cows EAT grass. They do not "have" grass.