Dogs have a reputation for eating anything and everything. They enjoy their food and even find stall food delicious. Some dogs though can actually be quite fussy. Loss of appetite in a dog is termed as anorexia. It is an uncommon condition in dogs and usually a symptom of some other underlying disease.
Temporary appetite loss in dogs is not serious since these hardy animals can stay healthy and active even if they don't eat for 48 hours. The condition becomes alarming when a dog refuses to eat completely or its daily intake of food decreases so much that it leads to drastic weight loss. Such a situation demands an immediate visit to a veterinarian.
Common symptoms which may accompany loss of appetite in dogs include
Changes in organ size
Changes in the eyes
Distention of the abdomen
Shortness of breath
Heart and lung sounds are diminished