In the gallinaceæ there may be inappetence, vomiting, diarrhœa, with
hurried breathing, sneezing, and the general phenomena of debility,
weakness, advancing emaciation and anæmia, the comb and wattles becoming
pale and flaccid and the visible mucosæ bloodless. The eyes are sunken
and lack lustre, the head sinks, the wings and tail droop, and weight is
steadily lost. When the bones and joints of the legs and wings are
involved the local swellings and distortions are visible indications of
the trouble.
In _parrots_ these local swellings and particularly the horn-covered
vegetations on the face and around the beak are characteristic.
_Canary._ Tuberculosis is common in the canary, contracted, as in the
parrot, from man, with whom alone the caged bird comes into dangerous
contact. The interchange of the disease between pet birds and their
owners would demand the exclusion of such from the rooms of
consumptives, and a careful watch for indications of disease of the air
passages with marasmus, that the bird may be disposed of before it has
become a source of danger.