POULTRY DISEASES AND THEIR TREATMENT 
which then become inflamed and swollen; 
a tumor, containing offensive, yellowish, 
cheesy matter, sometimes develops. The 
Fic. 19.—EXAMINING A FOWL WITH A SUSPICIOUS COLD 
course of the disease may extend over sev- 
eral weeks or months and there may be cases 
of chronic roup. Some cases end fatally 
84 
