LAMENESS FOLLOWING FRACTURE OF THE VERTEBRA. 121 



coniractions are excited. Here, as in a good many other 

 affections, it is of importance, in order to form a correct 

 diagnosis, to differentiate between actual pain, resulting 

 from the examination, and mere nervousness of the animal, 

 which in these cases is particularly difficult. 



Differential Diagnosis. — 1. Haemoglobinsemia. Differs 

 from the above in the history, the appearance of the urine 

 often being of a coffee color, or haemoglobin or albumin may 

 be found on chemical analysis. In haemoglobinsemia the 

 muscles of the croup are also hard, while paralyzed muscles 

 are soft and flabby. 



2. Thrombosis of the posterior Aorta. The history of 

 the case or rectal examination will be decisive. (See page 

 95.) 



