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W. L. ZUILL. 
blister, and after eacli application of the fire ? Have I not 
treated many cases of hock lameness which were unsatisfactory 
to the owner and mortifying to myself? I can answer these 
questions by saying that I have had a number of such experi¬ 
ences. The diagnostic symptom presented by this form of hock 
disease is that which is familiar to all of us. The animal goes 
upon his toes and warms out of his lameness after going a certain 
distance, but which again appears after a short rest, and may be 
again described as regularly intermittent. This is the only form 
of spavin lameness on exercise, even in its most acute stage; but 
prolonged exercise will aggravate the condition. 
Lesions of the Bones .—It frequently happens that there are 
lesions of the cuneiform bones, with consequent absorption of 
the articular cartilage, and ulceration of those surfaces, the lame¬ 
ness associated with it is entirely different from that which we 
usually consider belongs to this articulation. It is simply that 
of an ulcerative arthritis. It is not a very marked lameness, and 
in many instances hardly sufficient to take the animal off his 
work. It is very persistent in character, it does not improve on 
exercise or get worse on work, neither does prolonged rest 
greatly benefit the condition. The shoe is often worn as well on 
the lame side as on the sound side; the owner will always think 
that he has a case of rheumatism, and the veterinarian not in¬ 
frequently fails to make a diagnosis. When the two lesions ex¬ 
ist in the same hock, that is, an interarticular spavin associated 
with a diffused periostitis, with more or less calcareous deposit; 
then the lameness is a mixture of the two diametrically opposite 
groups of symptoms, that I have shown belong to these lesions 
when they exist alone. Under these circumstances we will 
probably experience the most difficulty in making a diagnosis. 
It is only after carefully weighing the history and comparing it 
with the clinical symptoms of the case, and excluding every 
other disease that may compromise this articulation, that we are 
able to reach a direct diagnosis. 
Having thus far briefly and hurriedly reviewed the conditions 
presented by the various forms of acute or sub-acute hock lame- 
