350 Veterinary Medicine. 



times in forty cases of icterus and Rancilla four times in five 

 cases. It has been frequently seen after severe surgical opera- 

 tions, and it is surmised that in both cases alike the deranged 

 peristalsis attendant on severe suffering was the cause of the 

 accident. 



Seat and Lesions. The most common seat of invagination is 

 in the small intestines, and less so in the caecum and colon, or 

 rectum. The lesions are as in the other animals, congestion, 

 infiltration, adhesion, necrosis, gangrene and sloughing. 



Symptoms. There may be colics as in the larger animals, but 

 in some instances there are simply prostration, dullness, inappe- 

 tence, vomiting, constipation, or the passage of a little liquid 

 and foetid excrement. Palpation of the abdomen detects a firm, 

 cylindroid and very tender swelling on the line of the softer intes- 

 tine which taken with the other symptoms is nearl}' pathognomo- 

 nic. If situated in the small intestine and disconnected from the 

 rectum and pelvis the diagnosis is more satisfactory. Impaction 

 is most commonly in the rectum and floating colon and can be 

 traced into the pelvis and even felt by the finger introduced into 

 the anus. It might be confounded with obstruction of the intes- 

 tine by the ingestion of twine, but the swelling is usually firmer 

 and the cylindroid outline more uniform in intussusception. 



Treatment. The measures recommended for the larger animals 

 are applicable to the dog. Cadeac has had four recoveries in 

 seven cases after the use of leaden shot and castor oil. Three 

 balls of No. 1 6 calibre are dipped in castor oil and given to the 

 dog. This is followed by Y^, oz. of castor oil slightly heated, and 

 walking or running exercise, or take the dog by his fore limbs 

 and walk him around on his hind. No drink is allowed for 24 

 hours, and a quart of decoction of flax seed on the day following. 



Should these measures fail, laparotomy is available, yet it is 

 more promising in proportion as it is resorted to early, before 

 ulceration, or gangrene has set in. The manipulations are prac- 

 tically the same as in the ox and the outcome is even more 

 promising. The diet should be restricted to milk or mucilaginous 

 gruels for a week after the operation. 



