212 VETERINAR Y DENTAL SURGER Y. 



SYMPTOMS. 



"While in that section of the United States 

 where it is most prevalent, it is spoken of as ' Big 

 Head,' ' Big Shoulder ' and 4 Big Jaw,' the three 

 terms designating its supposed location only. The 

 disease itself is characterized by the formation of 

 bony, tumorous appearing enlargements in the facial 

 region, at point of shoulder and in the rami of the 

 inferior maxilla, associated usually, but not always, 

 with a general unthrifty appearance; pulse but little 

 if any altered ; constipation rather a constant symp- 

 tom, respiration undisturbed, visible mucous mem- 

 branes may or may not be paler than normal, and 

 the body temperature but little or none above the 

 standard. The appetite usually remains good and 

 after the progression of the disease lameness of a 

 peculiar kind is evinced, while an almost ever present 

 symptom is the extremely small quantity of water 

 drank. So marked is this particular feature that 

 those in charge will usually acquaint you with this 

 fact upon first consultation. 



The disease seems to exist in two forms; acute 

 and sub-acute or chronic. Williams in classifying 

 this affection in his work on " Principles and Prac- 

 tice of Veterinary Surgery," places it under the head 

 of non-inflammatory osseous diseases, but in describ- 

 ing it presents phenomena in its course of develop- 

 ment and post-mortem appearances which corre- 



