Gaav (1969)

Masht Hassan owns the only cow in a remote and desolate village. He treats the cow as his own child. When he is away, his cow dies. Knowing the relationship between Masht Hassan and his cow, the villagers hastily dispose the corpse, and when Masht Hassan comes back, they tell him that his cow ran away. Masht Hassan is devastated, he starts to spend all his time in the barn, eating hay, and slowly believes that he is the cow.