You are probably thinking of a trough (pronounced "troff") or feed bunk or bale feeders. Cattle that are corraled in a drylot will eat out of feed bunks and/or bale feeders, as well as drink out of a water trough, be it an automatic waterer or one that has to be refilled with the hose daily. Out in their more natural habitat where grass grows thick from the earth, they graze from the ground, and get their water either from the waterer back home or from a water pump connected to a large dugout or slough.
If they're grazing, they'll be eating (or rather, grazing) out on the field, in a pasture, on the range or in a grassland. If they're being kept in a corral or feedlot, they will be eating in that corral or feedlot from hay bales in hay rings, or silage in long feedbunks or feed troughs.
It could be anything, depending on what you're talking about:
Nothing. Cows don't eat other animals.
No, cows only eat vegetation. Cows are herbivores.
cows eat grass
cows can eat nuts.
If Not They Would Never Eat Cows.
No, the cows are too big to eat.
yes cows can eat candy
Cows don't eat animals, they eat grass they are herbivores.
French cows eat grass.
Loins only eat cows sometimes.
They can eat wheat but it depends on the farmer if they want to feed cows wheat.
Cows will eat barley because they love the taste of it, and they can.
No. Walruses eat plankton and small fish, NOT cows.