Many cats keep their eyes open after death. This is because the eye muscles are weak and cannot allow the eyelids to complete the closing action, so the cat does not close its eyes after death. Generally, cats that die due to diseases do not close their eyes, because the body is in pain when they die. If the cat dies naturally, it may close its eyes. The cat will suddenly exhale loudly before dying, and then the body will gradually become stiff after death.