266 DISEASES OF HORSES AND CATTEE. 



venting the frog from coming in contact with the 

 ground. It is also caused by the animal standing 

 in dirty stables, and some years when the barn- 

 yard is in a wet, muddy condition for a long time 

 the feet never getting a chance to dry, but I have 

 found more cases caused by the former than the 

 latter. 



Symptoms: There is a discharge of a very foul 

 smelling matter of a dark color exuding from the 

 clefts of the frog. In cleaning out the clefts they 

 will be found deep and extending into the sensi- 

 tive parts, sometimes causing lameness. As it 

 spreads the horny frog becomes detached and 

 there will be matter underneath it. In cases 

 where, it is caused from navicular disease it is in- 

 curable. 



Treatment: Clean out the parts well, and if the 

 horse is lame put on a poultice of linseed meal for 

 a few days, then dry it and press a little calomel 

 into all the cavities; then press in some paper or 

 soft rags to keep in the calomel and keep out the 

 dirt. Clean out every second day until the clefts 

 are dry and healthy. Remove the cause to prevent 

 a return of the disease. 



Canker. — When a structure composed of low 

 organized tissue becomes injured, such as the frog, 

 it is very apt to produce a rapid growth of un- 

 healthy tissue, spreading over the whole of the 

 frog, even sometimes extending to the sole, but is 

 generally confined to the frog. As the fatty frog 

 is a tissue of low organization it is the usual seat 

 of canker. When tendons about the lower part of 



