SPAVIN.
Occasionally working oxen that are used in the lumber woods and made to pull heavily, with bad footing, are afflicted with this condition. When it occurs lameness is the first symptom. During the early stages of the disease the lameness is most severe in the morning, and disappears after the animal is exercised; it gradually becomes more severe as the disease advances, so that when the disease is well established the animal is lame continuously. Shortly after the lameness appears a bunch (exostosis) will be noticed on the inner and fore part of the affected joint. This bunch differs from bog spavin in that it is hard, while bog spavin is soft. It increases in size as the disease advances till the animal is too lame to be used for labor. As the disease is always attended with considerable pain there is more or less loss of flesh. In the most advanced stage the animal will step with difficulty, frequently holding the foot from the ground, or, if forced to take a few steps, stands with it elevated, twitching with pain. In the earlier stages of the disease only a small portion of the fore part of the lower, or second, articulation is involved, but the inflammatory process gradually extends over the whole surface of the lower joints of the hock. The structures of the joint are broken down and the bones are united (anchylosis). This process may include any or all of the three lower joints of the hock. The joint of motion which is situated on the lower end of the leg bone is seldom involved.
Treatment.—Treatment of spavin in the ox, as in the horse, is likely to be tedious, and not always resulting in perfect cure. Usually it is best to fatten the animal for slaughter. If, however, treatment is decided upon, it should consist of complete rest and counterirritation of the part either by sharp blisters or the firing iron. It is advisable to try the effect of blistering first, and for this purpose the following mixture is recommended:
| Powdered cantharides | dram | 2 |
| Biniodid of mercury | do | 2 |
| Vaseline | ounce | 1½ |
Clip the hair off and apply over the inner and fore part of the joint, covering the surface an inch and a half in every direction from the enlargement, or over an area 3 to 4 inches across. Fasten the animal's head so that it can not reach the part to lick it; after the third day grease with lard every other day until the scabs come off. This blister may be repeated three or four times at intervals of three weeks. The lameness will generally begin to disappear about the third or fourth month if the above-described treatment proves beneficial. Should lameness persist, firing in points by a qualified veterinarian may effect the desired result and should be tried as a last resort.
In a case of spavin the cure is not effected by restoring the diseased parts to their natural condition, but by uniting the bones and obliterating the joints. If this union extends over the whole articular surface of the joints affected and is sufficiently strong to prevent any motion of the bones, the animal will again go sound. The joints that are obliterated, not being those of motion, are not important, so that the animal suffers no inconvenience in their loss.
RHEUMATISM.
Rheumatism is a constitutional disease from a specific condition of the blood and characterized by inflammation of the fibrous structures of the body. It is usually accompanied with stiffness, lameness, and fever. The parts affected are usually swollen, but swelling may be lacking. The inflammation may be transitory; that is, it changes from place to place. The parts usually affected are the fibrous structures of the joints, tendons, ligaments, and muscles. The serous membranes and heart may also be affected. According to its location, rheumatism is specified as articular or muscular. According to its course, it is designated as acute or chronic.
Cause.—Among the factors which are actively causative of rheumatism may be mentioned exposure to dampness and cold, especially while the animal is perspiring or fatigued after severe physical exertion. Among other causes often mentioned are acidity of the blood, nervous derangement, microbes, and injuries. It occasionally follows another disease, such as pleurisy. The influence of age and heredity may be considered as secondary or predisposing causes. Sometimes the disease appears without any apparent cause. On the whole, it may be said that any of the above-mentioned factors may have more or less influence on the production of rheumatism, but the specific cause is as yet unknown.
Symptoms of articular rheumatism.—The symptoms appear suddenly and with varying degrees of severity. The animal presents a downcast appearance, with staring coat, horns and ears cold, and the mouth and muzzle hot and dry. Appetite and rumination may be impaired and followed later or be accompanied at the same time by constipation. Constipation may be followed by impaction of the stomach or bowels. Thirst is increased, but the amount of urine voided is scanty. Respiration and pulse are accelerated, and there is usually a fever, rising sometimes as high as 108° F. The animal prefers to lie down, and when forced to rise stands with its back arched. The movements are stiff and lame and cause great pain. The disease may attack one or more joints at the same time; in fact, it is often symmetrical. One joint may improve while another becomes affected, thus showing the shifting tendency of the inflammation. The affected joints, including their tendons, ligaments, and synovial membranes, may be swollen, hot, and distended with liquid. They are very tender, and, if treated carelessly or injured, may become infected, thus leading to suppuration. While rheumatism attacks perhaps more frequently the knees and fetlocks, it has no special affinity for any joint and may attack the stifle, hip, shoulder, or elbow joint. In mild cases of articular rheumatism, the animal may fully recover in a few days.