240 DR. LEGEAR'S STOCK BOOK. 



There may be some tenderness, but it is seldom that the disease 

 causes lameness. 



Treatment. If the animal is standing in filth or mud, remove 

 him to a clean, dry place. Trim off all diseased and ragged portions 

 of the frog and wash all dirt and filth thoroughly from the whole 

 foot and apply a linseed or wheat bran poultice to the affected 

 parts for one or two days. Add a little carbolic acid to the poul- 

 tice to remove the bad smell. After removing poultice, clean out 

 the cleft of the frog and pour in a little peroxide of hydrogen 

 twice a day and pack a piece of cotton well into the frog to retain 

 the medicine and keep out dirt. Calomel dusted into the frog 

 once a day and retained in it by a little cotton is a good remedy. 



CANKER 



Canker is a cancerous-looking fungoid growth in connection 

 with the frog or heel of the horse's foot. 



Causes. This disease is seen more frequently in heavy draft 

 horses. The essential cause of canker is the presence of a vege- 

 table parasite, which gains access to the foot of the horse by 

 standing in filthy stalls and stables. It may also follow thrush, 

 grease, or cracked heels. 



Symptoms. There is a soft, spongy, unhealthy looking growth 

 in connection with some part of the frog or heel of the foot. On 

 being cut it bleeds very freely, and there is generally a mattery 

 discharge of a very offensive odor. The growth may extend and 

 involve the whole sole and frog, and the horse is more or less 

 lame. 



Treatment. The treatment of cankers is tedious, and not very 

 successful, it being in all cases difficult to cure. Unless in a valu- 



