[hinckley buzzard]

Just to be fair, I used to work on a diary farm. The cows grazed in pasturage but when they came in to be milked they also ate from troughs. In the winter, they ate exclusively from troughs as the ground was often deep in snow. Mostly they ate corn ensilage though, not grain.

[Telepathic Intruder]

Damn I forgot what they did in winter! Probably taken away and made into hamburgers or something? But not all of them, surely. You see, I think of cows as being like small brachiosaurs. It was always warm in cretaceous times.