Broken heart
For most bereaved individuals, the journey through grief will ultimately culminate in an acceptable level of adjustment to a life without their loved one. The Kübler-Ross model postulates that there are five stages of grief after the loss of a loved-one: denial, anger, bargaining, depression and acceptance. And while it is recognized that mourners go through initial period of numbness leading to depression and finally to reorganization and recovery, most modern grief specialists recognize the variations and fluidity of grief experiences differ considerably in intensity and length among cultural groups, individually from person to person as well as depending on the amount of investment put into the relationship.
Animal grief
There are different “categories” of emotions known as primary and secondary emotions. Bekoff explains that primary emotions are similar to reflex or something along the lines of fear or fight-or-flight response. Therefore, it is something that animals react to such as loud noises, unknown objects, or odors (Bekoff, 2000). Having primary emotions is crucial because reactions to these are important for an animal's survival. The part of the brain that is responsible for primary emotions is the limbic system (Bekoff, 2000).