"But what, it may be asked, has this to do with the foot-rot? More, I am inclined to think, than is generally imagined. The hoofs of the sheep being intended to receive a degree of friction from hard surfaces, are not acted upon when the animal is placed under such circumstances; and the necessary consequence is an overgrowth of the hoof. The crust,--the part naturally intended to support the weight of the animal, and to endure the greatest share of fatigue,--is here allowed to grow out of all due bounds, because the softness of the pasturages, upon which it now moves, presents little, if any, of that rough friction to which the feet of the animal is naturally intended to be exposed. The crust, therefore, grows unrestrained, until it either laps over the sole, like the loose sole of an old shoe, and serves to retain and accumulate earth and filth, or is broken off in detached parts, in some cases exposing the quick, or opening new pores, into which the particles of earth or sand force their way, until reaching the quick, an inflammation is set up, which, in its progress, alters or destroys the whole foot." * * * * * "The finest and richest old pastures and lawns are particularly liable to this disease; soft, marshy, and luxuriant meadows are equally so; and it is also found in light, soft or sandy districts. In the first of these it is perhaps most prevalent in a moist season, and in the latter in a dry one; in short, it exists to a greater or less extent in every situation which has a tendency to increase the growth of the hoofs without wearing them away, and more especially where they are kept soft by moisture. It is so prevalent in fine lawns and pleasure grounds, that they are, in many instances, reduced in value to a mere trifle as a pasture for sheep; they are said to be _infected_ with this disease, and having once become so, the vicissitudes of _seven_ seasons are scarcely sufficient to destroy the contagion! A luxuriant herbage, on soft pastures, is equally subject to it; and, in both cases, the disease is increased in a wet season.