A friend of mine had one of her cats recently pass away. The second cat, a sibling from the same litter, is not taking it well at all. Destroying things, pacing, wailing meows during the wee hours, mimicking the deceased cat's habits, etc. All very sad. She's asking whether she should (1) get a kitten, (2) get an older cat, (3) get a small dog, (4) or just let her mourn.