Yes. Hay is THE main staple of any cow's diet when not on pasture.
Because they like it.
Because they like it.
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.
Yes.
Cows do not eat (nor drink) milk. They drink water and eat forages like grass, hay, silage and grains.
Roughages including hay and grass.
They can, but it's not nearly as nutritious as grass or hay.
Grass, hay and sometimes grain.
cows eat grain, grass and hay
Cows are grown up; they are mature female bovines. They eat grass, hay, silage, and other forages, basically.
They can, but it's not nearly as nutritious as grass or hay.
If they were given a choice, they'd choose grass over hay any day. But during the winter months when there is no grass to eat, hay is their primary choice.