> Grief is the anguish experienced after significant loss, usually the death of a beloved person. Grief often includes physiological distress, separation anxiet

> Grief is the anguish experienced after significant loss, usually the death of a beloved person. Grief often includes physiological distress, separation anxiety, confusion, yearning, obsessive dwelling on the past, and apprehension about the future. -- https://www.apa.org/topics/grief https://www.apa.org/topics/grief That seems to describe the behavior people have seen cats display after the loss of someone or another animal in their homes. Maybe they don't know it's death, but they know it's a loss and exhibit signs of distress, anxiety, and confusion. We can't really ask them to find out if they're dwelling on the past or apprehensive about the future though.