78 POULTRY DISEASES 



the bird aud is incurable except by resection of a 

 portion of its wall. This operation is simple and 

 easily performed. 



Gangrene of the Crop 



This condition has been observed several times 

 l)y the author. It resulted fatally to the birds af- 

 fected in all the cases studied. Upon opening the 

 crop a very offensive odor is noted, the mucous 

 lining will be found in a necrotic state (sloughing) 

 and appear as a dark, sometimes a greenish, case 

 ous mass. 



Treatment. — In the earlier stages there may be 

 given, in the feed or water, salol, subnitrate of 

 bismuth or sulphocarbolates compound. If the 

 condition becomes prevalent in a flock, the runs, 

 yards and henhouses should be thoroughly disin- 

 fected or the birds completely changed to new 

 grounds, and in any case given clean food and 

 drink. The sick should be separated from the 

 well birds and the dead should be burned. 



Catarrh of the Crop 



Irregular feeding, a distended crop and irritat- 

 ing and indigesible feed, such as feathers, putrid 

 meat and irritant chemicals, may be mentioned as 

 causes of this condition, which is essentially a 

 more or less chronic inflammation of the mucous 

 membrane, lining the crop. If the crop be over- 

 distended the strain on the muscles may be so 

 great that paralysis results. In these cases there 

 is noted a crop filled with a pulpy, soft, more or 

 less gaseous mass. 



Treatment. — If the crop be distended with a 

 dough-like mass, grasp the bird by the legs, hold- 

 ing the head downward, gently press out the mass, 



