FROG
,—in HORSES, is the centrical soft kind of horny substance at the bottom of the foot, spreading wide from the heel, having a cleft in the middle, and terminating in a point toward the toe. To the internal parts the lower extremity of the TENDONS are attached, and the FROG is the basis by which their elasticity is supported, and from whence is derived the deceptive reasoning, that the FROG must indispensibly (in action) touch the ground. The frog is subject to a defect, called the FRUSH, or THRUSH, and this, when become virulent, is termed running thrush: it sometimes arises from internal heat, by standing too much upon foul hot litter, (particularly in the livery stables of the Metropolis,) as well as from a STAGNANT state of the FLUIDS in the extremities, for want of proper exercise, leg rubbing, and keeping the feet clean.