40 DISEASES OF CATTLE. 



ing, constituting wh:it is called umbilical hernia. The wall of the sac 

 is formed by the skin, which is co\'ercd on the inner surface by a 

 layer of cellular tissue, and within this there is sometimes, but not 

 always, a layer of peritoneum. The contents of the hernia may be 

 formed by a part of the bowel, by a portion of the peritoneum, or may 

 contain portions of both peritoneum aud bowel. When the sac con- 

 tains only the peritoneum it has a doughy feel, but when it is formed 

 by a portion of the bowel it is more elastic on pressue. 



Causes. — In the new-born animal the opening of the naval is gen- 

 erally large, and may sometimes give way to the pressure of the 

 bowel on account of the weak and relaxed condition of the abdominal 

 muscles. This defective and abnormal condition of the umbilicus is 

 frequently hereditary. It may be occasioned by roughly pulling 

 away the umbilical cord ; through kicks or blows on the belly ; 

 through any severe straining by which the sides of the navel are 

 stretched apart. We may mention in this connection that it is best 

 in new-born calves to tie the umbilical cord tightly about 2 inches 

 from the navel, and then to leave it alone, when in most cases it will 

 drop off in a few days, leaving the navel closed. 



Treatment. — It is well to bear in mind that many, and especially 

 the smaller, umbilical hernias heal spontaneously ; that is, nature 

 effects a cure. As the animal gets older the abdominal muscles get 

 stronger and possess more power of resistance to pressure, the bowels 

 become larger and do not pass so readily through a small opening, so 

 that from a combination of causes there is a gradual growing to- 

 gether or adhesion of the sides of the navel. In cases of umbilical 

 hernia in which there are no indications that a spontaneous cure will 

 take place, the calf should be laid on its back, immediately on this 

 being done the hernia will often disappear into the abdomen. If 

 it does not, its reduction may be brought about l)}- gentle handling, 

 endeavoring, if need be, to empty the organs forming the hernia 

 before returning them into the abdomen. After the hernia has been 

 returned, the hair should be clipped from the skin covering it and a 

 compress composed of 10 or 12 folds of linen or cotton should be 

 applied, first smearing the skin with pitch and then a bandage about 

 3 inches wide should be passed round the body so as to retain the 

 compress in position. The lower part of the compress should be 

 smeared with pitch, and also those portions of the bandage which 

 pass over it, so as to keep it solid and prevent it from shiftinii'. In 

 some cases it will be found that the contents of the sac can not be 

 returned into t\\<d abdomen, and this generally arises from the fact 

 that some part of the contents of the sac has grown to or become 

 adherent to the edges of the lunbilical opening. In such a case the 

 skin must be carefully laid open in the long direction, the adhesions 

 of the protruding organs carefully separated from the umbilicus and 



