FOLLOWING INDIVIDUAL HOOF DISEASES. 141 



an immediate and material increase of lameness. Should all 

 four feet be foundered, the animal lies down constantly. In 

 cases of chronic founder, — that is, those where the os pedis 

 is dislocated, — distinct changes in the form of the hoof are 

 evident. The coronary region is depressed, and, as a conse- 

 quence, the anterior region of the wall of the hoof becomes 

 more or less concave and is covered with ridges diverging 

 toward the quarters. Such a hoof after some time is longer 

 than wide, the sole is convex, and there is supportiug-leg 



Fig. 26. 

 Hoof deformed by chronic laminitis. 



lameness with permanent forward pointing of the leg ; the 

 heels always touch the ground first, and thus in walking 

 slowly the double beat, mentioned before, is quite evident. 



Palpation. — Increase of temperature of the whole hoof, 

 especially about the toe ; pain upon pressure over the entire 

 toe region, and exaggerated throbbing of the collateral 

 artery of the cannon or digital arteries, form the diagnostic 

 points of founder. 



Differential Diagnosis. — Muscular rheumatism: It cannot 

 be denied that after a superficial examination this affection 

 is easily mistaken for founder ; still the characteristic points 

 of founder, viz., throbbing of the digital arteries, pain on 

 pressure and increased heat over the toe, region of the hoof, 

 are absent. In rheumatism the animal does not rest so 



