LAMENESS, FROM VARIOUS CAUSES. 



3G3 



bones are concerned ; yet, like spavin, ring-bone, and various other 

 diseases, it is accompanied, in certain stages, by pain and lameness, 

 and our services as physicians are only secured in view of remov- 

 ing this pain and lameness, so that the animal may be enabled to 

 perform the ordinary equine duties. This is what some persons 

 please to term a cure, whereas it almost always happens that some 

 alteration in the structure of the parts remains, which actually 

 renders the horse unsound, because he has that about him which 

 may, from overwork or other exciting causes, impair his useful- 

 ness. 



THE PATELLA, OB STIFLE BUNE. 



This cut shows the appearance of disease on articulatory surfaces when the animal is the 



subject of Osteo Porosis, or Big Head. 



As regards the "alarming" features of big head or big jaw, we 

 would inform the reader that almost every lame horse examined 

 by us, during a period of six months, in Ohio, had either one or 

 the other jaw enlarged. In some cases one angle of the lower jaw 

 was the seat of thickening and enlargement, but among the majority 

 both angles were affected. These remarks do not apply to other 

 obvious or accidental lamenesses which are constantly occurring. 



A short time ago we visited, in company with a practicing vet- 

 erinarian whose attention had never been called to this affect inn, 

 three horses, the subjects of lameness, which was said to be occa- 

 sioned by eating Hungarian grass. To the astonishment of the 

 parties concerned, we demonstrated that they were all the subjects 

 of enlargements of the lower jaws. From the history of the cases, 



