THOROUGH-PIN.
Cause.—Excessive labor.
Symptom.—A round tumor going right through the leg, and appearing anterior to the point of the hock. It is nearly always connected with bog spavin.
Treatment.—Never attack thorough-pin and bog spavin at the same time. Relieve the thorough-pin first by means of rags, cork, and an India-rubber bandage, cut so as not to press on the bog spavin. If the corks occasion constitutional symptoms, use a truss to press upon the thorough-pin, which, being destroyed, apply a perfect bandage and wetted cloths to the bog spavin. When attempting to cure bog spavin, however, continue the remedy to the thorough-pin, or the cure of one affection may reproduce the other.
THRUSH.
Cause.—Standing in filth, when it appears in the hind feet; navicular disease, when seen in contracted feet.
Symptoms.—A foul discharge running from the cleft of the frog. 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.