Webbed foot

“ The reason, of course, is that the hind-feet are carried forward in order to be placed upon the heels, while the fore are taken backwards to relieve the hind of the body-weight.
In like manner the movements of the animal will vary with the feet affected. With only the front-feet diseased the animal is, comparatively speaking, comfortable. The hind-feet take the weight, and the animal stands for long periods together, resting alternately first one fore-foot and then the other, moving often in a circle of which his body is the radius, and his hind-limbs the centre. ”

“ The great toe is usually twisted towards the median line, and the joint consequently has an ugly knotted appearance: all five toes are crushed together, and lose their natural shape, while the last, and often the last but one, is altogether distorted and deformed. Nor is the mischief confined to the toes: the whole foot, so seldom exposed to the open air, has a dry, lean, ill-nourished look. ”

“ In founder or chronic laminitis, where the sole of feet are dropped, caused by the displacement of the weight-bearing bones of the foot, fix the feet by lowering the quarters and heels so as to get as much frog pressure as is possible, without making the foot tender, and your foot is ready for the shoe. A shoe for a dropped sole foot must be a bar shoe, thick at the toe and thin at the heels, with a wide thin bar to receive the frog pressure. ”

“ It arises by the outer fibres of the common extensor muscles of the toes being separated. In all the anthropoids the feet are so articulated at the ankle-joints that the soles are directed towards each other, and only the outer edge of the foot comes to rest on the ground when the animal tries to stand. The feet have a tendency to assume a similar position in children at birth. The advantage of a muscle, such as the peroneus tertius, is apparent in the human foot, for it tends to raise the outer border of the foot, so that the sole is properly applied to the ground. ”

“ And yet that same cartilage, with the foot removed from the ground, is as pleasantly yielding to pressure of the thumb as the most exacting of us could wish for. In any case, then, where doubt exists, the foot should be lifted to the knee, and the cartilage carefully examined with the foot in that position. If, then, at any spot above the normal contour of the os pedis we meet with hardness or rigidity, we are to look upon that foot with suspicion. Nevertheless, providing our conscience is sufficiently elastic, the animal may be passed sound so far as the existence of a side-bone is concerned. ”

“ Neither ricketty legs nor yielding plantar-arches are strengthened by tightly laced boots, and although ignorant bootmakers will frequently recommend them, they must be strictly avoided, for what the muscles of the foot and leg want is freedom of action, not compression, which will impair their development.
That very rare thing a well-formed foot in middle life is nearly straight on the inside from the heel to the tip of the big toe; but in infancy the great toe stands out from the others, giving a wider spread to the toes, so that the inside of the foot is concave. ”

“ Contraction of the foot not infrequently results where the hoof is allowed to grow unduly long and the frog is removed from the ground, or where, as the result of injury to some part of the limb, the foot is rested for a long period. Whether the result of the one cause or the other, it is a condition which, if not carefully rectified by shoeing, may excite navicular disease. ”

“ From those we learn that a shoe with a flat-bearing surface, or one moderately seated but flat at the heels, is the correct shoe for nearly all feet. The heels of the shoe should not be too high, should not be too short, and should be wide enough apart from each other to insure the wall of the foot obtaining a fair share of the bearing. Finally, even with the present method of shoeing, whenever it is possible to allow the frog to come to the ground, it should be encouraged to do so, and excessive paring either of the latter organ or of the bars or the sole should be strictly discountenanced. ”

“ The toe-piece is screwed into the toe of the shoe when the horse is about to be exercised, and forms a powerful point of leverage with which to stretch the contracted tendon, and the shoe, being thin at the heels, admits of this. The advantage of this form of toe-piece over the ordinary form of fixed toe-lever is that it can be removed when the horse is in the stable; while the curved point diminishes the danger of the horse hurting itself—a danger always present if it is on a hind-foot. (See also Treatment of Purulent Arthritis in Chapter XII.) ”

“ The way of their prevention is already made plain, but to remove the disfigurement after it has become a settled thing is a much more difficult matter. The toe must be forced back to its former position, and kept there by a steady, constant pressure, and the parts be allowed time to gradually re-adapt themselves and grow fixed in their proper shape. The straightening of the toe will allow the bones to come nearer together at the joint, and this, when not sore, may perhaps be pushed back slightly, toward the middle of the foot, by the pressure of a narrow boot. ”

“ Flat-foot is occasioned by the loosening of the ligaments that knit the foot firmly together, and, by the consequent sinking of the arch, the inner aspect of the foot no longer presents the natural hollow in the sole. The causes of such loosening of the ligaments are numerous, but by far the most frequent, and one readily induced by the ordinary shoe, is weight improperly directed on the arch. ”

“ The feet become hot and dry, the hoof loses its circular form, and the growth of horn at the heels becomes excessive. At this stage the appearance of bulging at the sole begins to make itself seen. Later, the outer surface of the wall becomes 'ringed' or 'ribbed,' the rings being somewhat closely approximated in the region of the toe, and the distance between them gradually widening towards the heels. The wall too, especially in the region of the toe, instead of running in a straight line from the coronary margin to the shoe, becomes concave. ”

“ The third and fourth varieties are so rare that they are of no practical interest, and need not be further alluded to. It is possible to confound true talipes valgus with flat-foot, a deformity which is the result of undue stretching, from weakness, of the fascial and ligamentous structures which maintain the arched form of the foot. In flat-foot the arch is lost, the patient is splay or flat-footed, and as a secondary deformity the foot is turned outwards, resembling and often confounded with true talipes valgus. ”

“ In addition to the evil of the shoe itself, errors of practice in the forge contribute to the causation of contraction. Taking first the preparation of the foot, we find that often the heels are lowered far too much, and the toe allowed to remain too long. This can have but one effect—that of throwing a greater proportion of the animal's weight upon the heels than properly they should bear, with, what we now know to be the consequence of that, a corresponding pushing inwards and downwards of the horn ”

“ A few of the evils connected with the shoe may, however, be justly described as unavoidable. We must shoe; we cannot shoe and leave a normal foot!
A shoe excessively seated, especially from the last nail-hole backwards, may be regarded as dangerous. In this case, with every application of the body-weight, there is given to the foot a tendency to contract, especially at its lower margin. Result: undue pressure upon the tissues around and the production of corn. ”

“ High and narrow heels give an insecure hold of the ground, and throw the weight, which ought to be distributed over the sole, forward on the front part of the base of the toes. This unnatural position, besides rendering the risk of sprained ankles much greater, stretches the fibrous bands which bind the various and complicated bones of the instep into a beautiful arch, strong yet springy. The tough fibres yield, the foot flattens, elasticity and grace of movement disappear to a large extent, and aching pains are complained of. ”

“ When acquired as the result of overwork, of contracted tendons, or other causes, however, the gait becomes stumbling and uncertain. The body-weight is transferred from the heels to the anterior parts of the foot, and the shoe shows undue signs of wear at the toe.
Causes.—Upright hoof is undoubtedly hereditary, and is even seen as a natural conformation in the feet of asses and mules. When hereditary in the horse, however, it is certainly a defect, and is associated commonly with an upright limb, and a short, upright pastern (see Fig. 83) . ”

“ With these animals, it is of the utmost importance that the feet, especially the fore ones, be accurately levelled on both sides or ground face, according to the rule laid down, so as to obviate the risk of sprains and dislocations during rapid and energetic movements, particularly lateral twists of the lower joints. By leaving the sole, bars, and frog intact, the foot is not only strengthened, but muscular fatigue is wonderfully diminished, especially in traversing heavy ground. ”

“ Feet with high and contracted heels are also predisposed to corn. The contraction in this case interferes with the downward movements of the os pedis during progression, while in a state of rest there is a more or less constant pressure upon the sensitive structures, due to the correct downward displacement of the pedal-bone being opposed by the amount of contraction present. In the contracted foot, too, the nutrition of the vessels supplying the secretory apparatus of the horn is largely interfered with. ”

“ When at rest the foot is almost immediately pointed, and the pain at intervals manifested by pawing movements. It is this extreme liberty of the rest of the limb, as evinced during the pawing movements, that really strikes one. Shoulder, elbow, knee, and fetlock are all easily and painlessly flexed and extended. There is nothing wrong with them; it must be the foot. The short manipulation necessary to test the lameness—viz., the walk and slow trot—is sufficient to raise the animal's pulse and quicken the breathing. ”

“ Any mechanical displacement of one bone throws not only all bones out of harmonious working order but also disarranges their accompanying muscles and the nerves attached to them, resulting in inefficient action and in radiating pains. The fleshy parts of the foot are at the sole, ball, on the bottom of the heel and along the outer border and they play the part of protection where it is most needed. The bottom flesh forms pads in walking and supporting the body, insuring springiness and lessening the jar which is incidental to locomotion. ”

“ No ordinary shoe, except a few devised for the purpose, such as the Charlier or the tip, allows the frog to come in contact with the ground. This we take to be the main factor in the causation of contracted heels, especially with a predisposition already present in the foot itself. In the words of Lungwitz: 'Regarded from this point of view, there is no greater evil than shoeing. It abolishes the necessary counter-pressure, and thus interferes with expansion. ”

“ The long and slender toes terminate in round, sucker-like discs, and are furnished with flat nails, except on the second and third toes, where the nails are merely compressed claws. The fore-limb, with or without the hand, is longer than the trunk; its digits also are long and slender (the third being longest, and the second equal to the fourth) and, like those of the foot, terminate in round sucker-like discs. Both the wrist and ankle are haired. ”