Anticipatory grief
The five stages namely, denial, anger, bargaining, depression, and acceptance proposed by Elisabeth Kübler-Ross in her model of grief describe the process by which people undergo after a loss. Anxiety, dread, guilt, helplessness, hopelessness, and feelings of being overwhelmed are also common. However, it is important to note that anticipatory grief is not simply normal grief begun earlier.
Animal grief
Grief is “a multifaceted response to loss, particularly to the loss of someone or something that has died, to which a bond or affection was formed”. A common emotion amongst humans, grief is also apparent in other animals, known as animal grief. In the late 19th century, research started to show grief in chimpanzees and the connection between animal and human grief. However, until recently, grief has never been the focus of research. Marc Bekoff, a scientist, has spent his time researching emotions in animals, including grief. Combined with other research, the following animals have been seen to grieve: wolves, chimpanzees, magpies, elephants, dolphins, otters, geese, sea lions, and many more.