DIFFICULT PARTURITION (DYSTOKIA) 



311 



4. Two puppies may try to enter the body of the uterus, 

 one from either horn, at the same time, and become tightly 

 wedged together, thus blocking up the passage and prevent- 

 ing either from advancing. 



It is easy to understand, without much explanation, that 

 any of the above causes would, merely on mechanical grounds, 

 give rise to trouble. In toy breeds especially, trouble from 



Fig. 193. — A Monstrositjr removed from a Blenheim Spaniel. "^ 



an abnormally large foetus is frequent, and this contingency 

 is more to be feared when there are only one or two pups 

 than when the mother has a large number. 



Of unnatural presentations, the worst is one in which the 

 back or loins alone can be touched, and it requires consider- 

 able patience and delicacy of manipulation to get over this 

 difficulty. At times it is impossible even by embryotomy, 



^ For this photograph I am indebted to Mr. Ernest Perry, M.R.C.V.S. 



