SUBACUTE LAMINITIS.
This is a variety of the former disease; the characteristic differences between the two are thus stated by the esteemed late William Percival:—
"In neither form is laminitis the disease of the unbroken or unused horse. Now and then acute laminitis will appear in the four or five year old horse when newly taken into work; more commonly it is witnessed incapacitating the horse when at work, and during the middle period of life. Subacute laminitis, on the other hand, is very apt to select the aged and worked animal. Secondly, acute laminitis is the immediate effect of labor, hard either from its distressful character or its endurance. Subacute laminitis, on the contrary, will make its appearance in the stable where the horse has been for some time living in a state of idleness or absolute rest. Thirdly, acute laminitis makes its attack directly or shortly after the application of the exciting cause; subacute laminitis approaches so gradually that it is often present some days before its existence is discovered. Fourthly, acute laminitis is marked by great suffering and accompanied by raging fever; in subacute laminitis fever is not to be detected, and the mode of progression alone indicates suffering. Fifthly, acute laminitis may terminate in metastasis, suppuration, and mortification; in subacute laminitis neither of these issues is to be dreaded, for, if we do not succeed in producing resolution, dropping of the coffin-bone is the customary ending to the disorder."
The above, quoted from memory, presents a graphic contrast and an admirable portrait of the disorder. It is so eloquent in its brevity that it leaves nothing to be added; therefore the author will at once proceed to state his views of the subject.
Subacute laminitis is always first noticed in the manner of progressing. The master complains that the horse has become slower; that the whip has lost influence over the body; and that the animal, when progressing, appears to jolt more than usual. This last observation indicates the kind of horses to which subacute laminitis is principally confined. Acute laminitis is almost the property of fast saddle-horses; the subacute variety more especially belongs to harness-horses. The author has lately seen specimens of the subacute disease tugging those vehicles which were once fashionable and which were called "cabriolets." The animal suffering this disorder endeavors to bring the heels only to the ground. All its fumbling gait, its supposed sluggishness, and want of appreciation for the whip are to be attributed to this desire—to take the weight as much as possible from the seat of agony.
THE MANNER OF PROGRESSING WHEN SUFFERING UNDER SUBACUTE LAMINITIS.
The success of treatment, in a great measure, depends upon the disorder being early detected. Get the horse immediately into slings, as was directed for acute laminitis, and proceed in the same manner with the removal of the shoe. Omit all bleeding. If the bowels are costive, allow a portion of green-meat until the evil is removed; but do not produce purgation. All medicine of a debilitating character must be withheld. Give, night and morning, a quart of stout; allow two drinks, each containing one ounce of ether, in half a pint of water, during the day. This, with half-drachm doses of belladonna as needed to allay any symptoms of pain, will constitute the whole of the treatment.
As regards food, it should consist of sound oats previously ground, and a moderate allowance of crushed, old beans. The water should be whitened, and all hay strictly withheld. The animal should not be left night or day, and gentleness should be enjoined upon its attendant. The food, however, should not be without limit; five feeds of corn are enough for one day, if the horse will eat so much.
Should dropping of the coffin-bone end the attack, it is only charity to terminate the existence. In Mr. W. Percival's admirable work the reader will find described at length a method proposed for restoring the bone to its original position. The author has seen that plan tried more than once, but never beheld any good result. The knacker has, in every case, been called in to finish the unsuccessful experiment.