Loucas Por Cavalos(1986)

The family's pet cat narrates the very unique events and behaviors of its owners. First, he talks about the madness of its owner - a pretty young woman in her 20s, with a cyclothymic temperament, always alternating laughing and crying, for no apparent reason. But the woman has a serious problem that leads her husband to fight with her almost every day. She is delirious and talks in dreams. The husband is suspicious of her happiness. The woman starts to hallucinate. As she talks to her husband, she sees him with a horse's head.