A bird will instinctively attempt to hide any appearance of illness as long as possible. This is a survival tactic in the wild. Therefore, by the time symptoms are apparent, the bird may have been sick for some time. Familiarity with the your bird's healthy behavior, feeding habits and droppings may be the key to early detection and treatment of illness. Decreased or increased consumption of food or water.
Breathing sounds such as sneezing, wheezing or clicking.
Change in weight or general body condition. Enlargement or swelling on the body. Injury or bleeding. Birds do not have a large blood supply and can quickly lose a critical amount of blood. Vomiting or excessive regurgitation.