_Symptoms._ The defecations are infrequent, and small, and covered by a mucus film on a glazed surface. This increases steadily until they cease altogether, when straining, tympany, rumbling and vomiting follow. The animal refuses food, and lies on its belly, hiding under the straw when that is available. Restlessness with frequent change of place and grinding of the teeth are noticed. A spontaneous cure may take place by a free secretion of liquid in which the impacted mass is loosened, disintegrated and floated off, the costiveness being succeeded by diarrhœa. Once established this diarrhœa may become persistent, causing serious loss of condition, and simulating hog cholera. It may be distinguished by the fact that it occurred without the introduction of a _contagium_, is easily accounted for by the nature of the food and is not communicated to adjacent herds treated in a different way. There is also the absence of the petechiæ on the skin, and, on post mortem, of the specific round necrotic intestinal ulcers of hog cholera. _Treatment._ The first object is to rid the intestines of the irritating impacted masses, and this may be secured by giving 1 oz. castor oil, 2 drs. jalap, or 3 grs. croton farina to a 150 lb. pig. This may be seconded by frequent and copious injections of soapsuds. If fermentation and tympany are troublesome 30 grs. chloral hydrate may be given and repeated as circumstances demand it. Active rubbing of the abdomen or kneading of the same will prove useful. If tympany becomes dangerous the gas may be safely evacuated by trochar and cannula, the point of puncture being selected by the clearness of the resonance. When the impaction has reached the rectum and prevents the use of enemata, it may be extracted with the oiled fore finger. An injection of sweet oil may then be given and the finger may be used again and again as the impacted fæces come within reach. When diarrhœa has set in it may be checked by doses of 30 to 60 drops of laudanum, and a diet of boiled milk, well boiled flaxseed or other starchy gruel or mush. A course of bitters with chalk, bismuth or antiseptics will prove serviceable during convalescence. INTESTINAL INDIGESTION IN THE DOG WITH CONSTIPATION.