To examine the organs of digestion one needs to study the appetite and manner of taking food and drink. A healthy animal has good appetite. Loss of appetite does not point to a diseased condition but comes from a variety of causes, some of which might be physiological. Excitement, strange surroundings, fatigue and hot weather may all cause loss of appetite. Sometimes depression, fever, weakness, stomach disorders or difficulty in swallowing also cause diminished appetite. Sometimes there is desire to eat abnormal things due to chronic disturbance of nutrition. It is variably linked to one's psychological aspects also. In times of inward happiness one tends to binge more on food but in times of turmoil and tension one loses the desire to eat even if hunger persists. At times, thirst faces this imbalance as well. Especially in times of crisis or shock your mouth goes dry. So, hunger loss can not only be connected with appetite loss due to disease, there are profound psychic disturbances also attributing to its fall.