This could be for a number of reasons: they are eating too much grain before eating hay, they are sick, or the hay could be molding or tasting bad.
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.
Yes. Hay is THE main staple of any cow's diet when not on pasture.
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.