When a cat loses a companion, whether animal or human, she most certainly grieves and reacts to the changes in her life. Cats alter their behavior when they mourn much like people do: They may become depressed and listless. They may have a decreased appetite and decline to play.

How long does it take a cat to grieve?

It can take anywhere from days to months for a cat to go through these three stages. The ASPCA study had similar findings, stating that all cats who had lost a companion returned to normal within six months.

Do cats grieve the loss of another cat?

Yes, cats do experience grief at the loss of a another household pet, especially if they had a close-knit bond. Cats are individuals, and just like humans, their process for coping with loss will vary. ... Some cats might retreat, hide, start eating less, or become clingy.