ALPHABETICAL SUMMARY. 511 
This decomposes the horn. The surface of the frog becomes ragged, 
and the interior converted into a white powder. The affection does not 
generally lame; but should the horse tread on a rolling stone, it may fall 
as though it were shot. 
Treatment.—Pare away the frog till only sound horn remains, or 
until the flesh is exposed. Then tack on the shoe and return to a clean 
stall. Apply the chloride of zinc lotion—three grains to the ounce of 
water—to the cleft of the frog by means of some tow, wrapped round a 
small bit of stick. When the stench has ceased, a little liquor of lead 
will perfect the cure. For contracted feet pare the frog, and every 
morning dress once with the chloride of zinc lotion; but do not strive 
to stop the thrush. 
TREAD. 
Cause.—Fatigue and overweight. 
Symptom.—In light horses it occurs toward the end of a long jour- 
ney. The hind foot is not removed when the fore foot is put to the 
ground. The end of the fore shoe consequently tears off a portion of 
the coronet from the hind foot. In cart-horses, after the horse is 
fatigued, the load has to be taken down a steep hill; the animal, being 
in the shafts, rocks to and fro; the legs cross, and the calkin of one 
shoe wounds the coronet of the opposite hoof. 
Treatment.—Bathe the sore with the chloride of zine lotion, one 
grain to the ounce of water. Continue to do this thrice daily; feed 
liberally. A slough will take place, and the animal be well in about a 
month; the only danger being the after-result of a false quarter. 
TUMORS. 
These are so various and of such different natures, that in every case 
a surgeon should be consulted. 
WARTS. 
Cause.—Unknown. 
Symptom.—There are three kinds of warts. Ist. Some are contained 
in a cuticular sac, and, upon this being divided, shell out. 2d. The 
second are cartilaginous and vascular. These grow to some size, and 
are rough on the surface. They are apt to ulcerate. 38d. Consists of 
a cuticular case, inclosing a soft granular substance. 
Treatment.—When of the first kind, slit up, and squeeze them out. 
The second kind, excise and apply a heated iron to stop the bleeding. 
The third kind are better let alone. 
