Essays on horse subjects — A Closer Reading

s narrower from before backwards, than it is just above the fetlock. In this condition the tendons behind the knee are not well developed, and are placed too close to the shank-bone at this point. This imperfect tendonous development in a front leg is not usually confined to the tendons behind the leg, called the flexor tendons, as an imperfect development of these tendons is usually associated with an impaired development of the tendons running down the front of the leg called the extensor tendons. Such a condition frequently results in shaky knees, and if the subject experiences hard work, he is likely to become progressively worse. In some cases the flexor tendons appear to be much better developed than the extensors, and in an individual so formed, particularly if he is inclined to stand with his forefeet well back under him, there is an inordinate strain on the extensors, leading to relaxation and a corresponding tendency to contraction of the flexors. Here we have a lack of balance between the extensors and flexors, and the result is a knee-sprung condition. Although shaky-kneed or knee-sprung horses are not frequently incapacitated for work, the breeder should not lose sight of the fact that this condition is apt to considerably depreciate a horse’s value in the market, particularly for some purposes, and he can seldom afford to ignore this fact. It is not intended to advise breeders never to breed to a sire that stands a little over in the knees, especially if sufficient cause can be assigned for it, but we should recommend them to be very wary about using sires and dams that show a congenital tendency to this defect. Purchasers of horses usually look with considerable disfavor on a horse that is at all knee-sprung. Personally, the writer would rather buy a horse for his own use that is a little forward in the knees than one that stands back in them or is what is called calf-kneed. A horse with the former defect is almost sure to be much more elastic in his step than one with the latter and, consequently, will not suffer to the same extent from the ill-effects of concussion. A calf-kneed horse is also much more likely to suffer from strains. Knee-sprung, unlike the other unsoundnesses given in the list of hereditary troubles, is not very infrequently congenital. Swan-necked horses and those with thick, coarse throttles are considered to be of the formations most liable to develop the defect of the wind called “roaring.” In Great Britain and Ireland and on the continent of Europe, breeders are usually very particular about avoiding roarers for breeding purposes. The climatic conditions there seem favorable to its development; but in this country it is not nearly so much to be feared, and one should not hold aloof from an otherwise desirable sire on account of his being a roarer, though it must be admitted that the predisposition to the trouble may be transmitted. The predisposition to periodic ophthalmia or moonblindness is handed down from parent to offspring, but it is not nearly so common in this country as it once was, when the sanitary conditions were not so good; and it may be that some care has been exercised in breeding, so as to avoid its propagation. The only appreciable evidence of a predisposition to this unsoundness, outside of the existence of the disease, is the small or what is called “pig eye.” The writer knew a sire well that had “pig eyes” but sound ones, and they remained sound throughout his long life, but certainly ten per cent. of his progeny developed moonblindness.

The tendency to string-halt is undoubtedly transmissible from parent to offspring. Horses with snappy hock action are most likely to develop it. Nowadays it is not feared nearly so much as it was formerly, for if it should develop, a very large percentage of cases are curable by a not very difficult and by no means dangerous operation, which consists in the cutting of a tendon. A change has taken place in the generally accepted view as to the nature of string-halt. It was considered a purely nervous malady until it was found that the cutting of a tendon would in many instances cure it.