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Copyright

Copyright

U. S. DEPARTMENT OF AGRICULTURE, BUREAU OF ANIMAL INDUSTRY.

A. D. MELVIN, Chief of Bureau. SPECIAL REPORT on DISEASES OF THE HORSE.
by Drs. PEARSON, MICHENER, LAW, HARBAUGH, TRUMBOWER, LIAUTARD, HOLCOMBE, HUIDEKOPER, MOHLER, EICHHORN, HALL, AND ADAMS.
REVISED EDITION, 1916.

WASHINGTON:
GOVERNMENT PRINTING OFFICE.
1916.

Transcriber's note: Minor typos have been corrected and footnotes moved to the end of the sections. The images for the plates are thumbnails that take you to a larger version of the image.

Department of Agriculture,

Washington, March 30, 1916.

This edition of the Special Report on Diseases of the Horse has been prepared in compliance with House Concurrent Resolution No. 13, passed February 3, 1916, as follows:

Resolved by the House of Representatives (the Senate concurring), That there be printed and bound in cloth one hundred thousand copies of the Special Report on the Diseases of the Horse, the same to be first revised and brought to date, under the supervision of the Secretary of Agriculture; seventy thousand copies for the use of the House of Representatives and thirty thousand for use of the Senate.

Since the original edition issued by the Department in 1890 several editions have been printed by order of Congress. The work was reprinted in 1896, and revised and reprinted in 1903, 1908, and 1911. In accordance with the foregoing resolution it again has been revised so as to embody the latest practical development of knowledge of the subject.

D. F. Houston,
Secretary.

This book is now a public domain material.

Either firing alone or stimulation with blisters is

Either firing alone or stimulation with blisters is

Either firing alone or stimulation with blisters is

Either firing alone or stimulation with blisters is of great efficacy for the relief of lameness from bone spavin. Failure to produce relief after a few applications and after allowing a sufficient interval of rest should be followed by a second or, if needed, a third firing.

In case of further failure there is a reserve of certain special operations which have been tried and recommended, among which those of cunean tenotomy, periosteotomy, the division of nervous branches, etc., may be mentioned. These, however, belong to the peculiar domain of the veterinary practitioner, and need not now engage our attention.

At this point a word of explanation in

At this point a word of explanation in

At this point a word of explanation in

At this point a word of explanation in reference to this operation of firing may be appropriate for the satisfaction of any among our readers who may entertain an exaggerated idea of its severity and possible cruelty.

The operation is one of simplicity, but is nevertheless one which, in order to secure its benefits, must be reserved for times and occasions of which only the best knowledge and highest discretion should be allowed to judge. It is not the mere application of a hot iron to a given part of the body which constitutes the operation of firing. It is the methodical and scientific introduction of heat into the structure with a view to a given effect upon a diseased organ or tissue by an expert surgeon. The first is one of the degrees of mere burning. The other is scientific cauterization, and is a surgical manipulation which should be committed exclusively to the practiced hand of the veterinary surgeon.

An indication of more energetic means is then presented

An indication of more energetic means is then presented

An indication of more energetic means is then presented

Rest and counterirritation, with the proper medicaments, constitute, then, the prominent points in the treatment designed for the relief of bone spavin. Yet there are cases in which all the agencies and methods referred to seem to lack effectiveness and fail to produce satisfactory results. Either the rest has been prematurely interrupted or the blisters have failed to modify the serous infiltration, or the case in hand has some undiscernible characteristics which seem to have rendered the disease neutral to the agencies used against it. An indication of more energetic means is then presented, and free cauterization with the firing iron becomes necessary.

It will be well for both the horse and his owner

It will be well for both the horse and his owner

It will be well for both the horse and his owner

For this reason, moreover, he will do well to be on his guard against the patented "cures" which the traveling horse doctor may urge upon him, and withhold his faith from the circular of the agent who will deluge him with references and certificates. It is possible that nostrums may in some exceptional instances prove serviceable, but the greater number of them are capable of producing only injurious effects. The removal of the bony tumor can not be accomplished by any such means, and if a trial of these unknown compounds should be followed by complications no worse than the establishment of one or more ugly, hairless cicatrices, it will be well for both the horse and his owner.

Good results may also be expected from local applications

Good results may also be expected from local applications

Good results may also be expected from local applications

Good results may also be expected from local applications. The various lotions which cool the parts, the astringents which lower the tension of the blood vessels, the tepid fomentations which accelerate the circulation in the engorged capillaries, the liniments of various composition, the stimulants, the opiate anodynes, the sedative preparations of aconite, the alterative frictions of iodin all these are recommended and prescribed by one or another. We prefer counterirritants, for the reason, among many others, that by the promptness of their action they tend to prevent the formation of the bony deposits. The lameness will often yield to the blistering action of cantharides, in the form of ointment or liniment, and to the alterative preparations of iodin or mercury. If the owner of a "spavined" horse really succeeds in removing the lameness, he has accomplished all that he is justified in hoping for; beyond this let him be well persuaded that a "cure" is impossible.

To consider a hypothetical case

To consider a hypothetical case

To consider a hypothetical case

Treatment. To consider a hypothetical case: An early discovery of lameness has been made; that is, the existence of an acute inflammation of periostitis has been detected. The increased temperature of the parts has been observed, with the stiffened gait and the characteristic pose of the limb, and the question is proposed for solution, What is to be done? Even with only these comparatively doubtful symptoms doubtful with the nonexpert we should direct our treatment to the hock in preference to any other joint, since of all the joints of the hind leg it is this which is most liable to be attacked, a natural result from its peculiarities of structure and function. And in answer to the query, What is the first treatment indicated? We should answer rest emphatically, and as an essential condition, rest. Whether only threatened, suspected, or positively diseased, the animal must be wholly released from labor, and it must be no partial or temporary quiet of a few days. In all stages and conditions of the disease, whether the spavin is nothing more than a simple exostosis, or whether accompanied with the complication of arthritis, there must be a total suspension of effort until the danger is over. Less than a month's quiet ought not to be thought of the longer the better.

Having thus fully considered the history of bone spavin

Having thus fully considered the history of bone spavin

Having thus fully considered the history of bone spavin

Prognosis. Having thus fully considered the history of bone spavin, we are prepared to give due weight to the reasons that exist for the adverse prognosis which we must usually feel compelled to pronounce when encountering it in practice, as well as to realize the importance of early discovery. It is but seldom, however, that the necessary advantage of this early knowledge can be obtained, and when the true nature of the trouble has become apparent it is usually too late to resort to the remedial measures which, if duly forewarned, a skillful practitioner might have employed. We are fully persuaded that but for the loss of the time wasted in the treatment of purely imaginary ailments very many cases of bone spavin might be arrested in their incipiency and their victims preserved for years of comfort for themselves and valuable labor to their owners.

An excellent test for spavin lameness

An excellent test for spavin lameness

An excellent test for spavin lameness

An excellent test for spavin lameness, which may be readily applied, consists in lifting the affected leg from the ground for one or two minutes and holding the foot high so as to flex all the joints. An assistant, with the halter strap in his hand, quickly starts the animal off in a trot, when, if the hock joint is affected, the lameness will be so greatly intensified as to lead readily to a diagnosis.

Though for a somewhat different reason

Though for a somewhat different reason

Though for a somewhat different reason

As with sidebones, though for a somewhat different reason, the dimensions of the spavin and the degree of the lameness do not seem to bear any determinate relation, the most pronounced symptoms at times accompanying a very diminutive growth. The distinction between the two varieties of cool and warm, however, may easily be determined by remembering the fact that in most cases the first, or cool, is due to a simple exostosis, while the second is generally connected with disease of the articulation, such as ulceration of the articular surface a condition which, as we proceed further, will receive our attention when we reach the subject of stringhalt.