Answer:

The primary cause is generally a cold, but it may be the result of inhaling irritating vapors or dust.

In severe cases there is loss of appetite and the bird presents a generally dull appearance. The breathing is somewhat faster than normal and there is whistling, wheezing sound, which develops into a rattling or gurgling noise by reason of the air passing through the mucous.

Treatment is not very successful. Give three drops of syrup of ipecac twice a day and force the bird to inhale the steam from boiling water in which has been placed a teaspoonful of carbolic acid to a gallon of water.