Part 58

In the performance of any operation upon an animal of the size and strength of the bull or cow, the first consideration is to secure the animal in such a manner as to preclude the possibility of its injuring either itself or those taking any part in the operation. The nature and time likely to be occupied by an operation must, of course, largely determine the method to be adopted.

The majority of operations with which the present chapter is concerned are usually performed on the animal in a standing position. A bull should always be held by a staff attached to the ring in his nose. To secure the cow in a standing position, grasp the nose, the finger and thumb being introduced into the nostrils, and press against the cartilage which makes a division between them. If she has horns, grasp one of them with the disengaged hand. If this is insufficient the animal should be secured to a post, along the side of a fence, or put into a stanchion. An excellent method of restraint is to tie a long rope in a slip noose over the horns, pass it around the chest just behind the forelegs, taking a half hitch on itself, taking another half hitch in front of the hind limbs, passing the free end under the tail, bringing it forward and making it fast either to the head or one of the hitches. The head should be raised to the level of the back before the final knot is tied, so as to render it too serious and painful a matter for her to repeat the first attempt she makes to lower it. Should the nature or extent of the operation be likely to take up considerable time, it is invariably the best plan to throw the animal. In the case of the ox this is very easily done, either by use of horse hobbles, should they be at hand, or by the application of a simple rope. If the horse hobbles are used, they should be fastened on the leg just above the fetlocks (ankle joints), as in that position they are less liable to come off than if placed around the pastern.

Of the many ways of applying the rope for this purpose we will describe only two, which we consider the best and simplest:

First. Take a long, strong rope (one which has been used a few times is more flexible), double it, and at 2 or 3 feet from the doubled end, according to the size of the animal, make a knot and pass the collar thus formed over the animal's head, allowing it to rest on what would be the collar place in a horse. Now, pass the ends of the rope between the forelegs, carry one around each hind leg just above the fetlock joint, from outside in, under itself once, and bring the free ends forward, passing each through the collar loop on its own side and bringing the slack back toward and beyond the hind quarters. (Pl. XXVI, fig. 2.) Two or three men should then take hold of each rope and at a given signal pull. The animal's hind legs being drawn forward, the balance is lost, and if the animal does not fall or lie down he can be readily pushed over on his side and secured in the desired position.

Second. The three half hitches. Take a rope 30 or more feet long, make a slip noose at the end and pass it over the animal's horns, leaving the knot in the loop between the horns; then pass the rope backward along the neck to the withers, just in front of which take a half hitch on it, passing it along the back, take one half hitch just behind the forelegs and a second in front of the hind limbs round the flank. (Pl. XXVI, fig. 1.) The free end of the rope is taken hold of by one or two assistants while another holds the animal's head. By pulling firmly on the rope, or inducing the animal to make a step or two forward while steady traction is made on the rope, the beast will lie down, when his feet can be secured in the way most convenient for the operator.

There are numerous other methods, involving more or less complete restraint, which may be equally efficacious, but one or other of the ways indicated will doubtless be found to meet fully all ordinary cases.

RINGING THE BULL.

This is usually and ought always to be done before the calf has attained sufficient weight or strength to make his restraint a matter of serious difficulty. An ordinary halter is usually all that is required, the strap being secured to a tree or post. A jointed steel or copper ring is ordinarily used. Those made of the latter metal are preferable.

The common method of punching a round piece out of the nasal septum for the introduction of the ring is, I think, open to objection, as portions of the fine nervous filaments are destroyed. The sensibility of the parts is thus lessened and the object of ringing to some extent defeated. The insertion of the ring by means of a trocar and cannula is preferable, as the method is not open to this objection.

For some years we have used a little instrument, which can be made by any worker in metal, consisting of a steel point riveted into a short cannula made to fit on one end of the ring while open. (Pl. XXVII, fig. 11.) When attached to the ring it is easily and quickly passed through the septum, the half of the ring following as a matter of course. It can then be removed and the ends of the ring brought together and fastened by means of the screw for that purpose.

DEHORNING.

In the wild state the utility of the horns of cattle as weapons of offense and defense is apparent, but with domestication of cattle and their confinement the presence of horns constitutes a menace to the safety of their companions. Horned cattle frequently inflict with their horns painful and serious injuries to others. Deaths as a result of such injuries are not unusual. The operation of dehorning would therefore be indicated as a matter of general safety.

On farms where breeding is conducted, the most desirable method is to prevent the horns from growing on the young calves. This action results in a more symmetrical appearance of the poll and eliminates the dangers which would result from the presence of horns on the young cattle prior to their operative removal at a later age. A calf should be treated not later than one week after it is born--preferably when it is from 3 to 5 days old. The agent to be used may be either caustic soda or potash in the form of sticks about the thickness of an ordinary lead pencil. These caustics must be handled with care, as they dissolve the cuticle and may make the hands or fingers sore. The preparation of the calf first consists in clipping the hair from the parts, washing clean with soap or warm water, and thoroughly drying with a cloth or towel. The stick of caustic should be wrapped in a piece of paper to protect the hands and fingers, leaving one end of the stick uncovered. Moisten the uncovered end slightly and rub it on the horn buttons or little points which may be felt on the calf's head--first on one, then on the other--two or three times, allowing the caustic to dry after each application. Be careful to apply the caustic to the horn button only, for if it is brought in contact with the surrounding skin it will cause pain. Too much moisture on the stick of caustic will allow the application to spread to the surrounding skin. After treatment keep the calf protected from rain, as water on the head after application of the caustic will cause it to run down over the face.

Dehorning of adult animals is usually performed after the age of 2 years, as after that age there is less probability of the horns again growing. The horns should be severed from the head from a quarter to a half-inch below where the skin joins the base of the horn, cutting from the back toward the front if a saw is used. If the horn is not cut close enough to the head, an irregular, gnarly growth of horn is liable to follow.

Before attempting to dehorn the animal, it should be securely controlled by ropes in a stanchion or by casting. Upon the range the cattle are usually controlled by casting or by placing them in a "squeezer" connected with a corral. A clean, sharp meat saw or a miter saw with a rigid back may be used. Various types of dehorning shears or clippers are in general use. One type of dehorner has a stationary knife edge with its cutting edge shaped like a very wide V, and opposing this, another knife of similar shape moving in a slide, so that the cutting edges act upon the horn from all four sides at once, all the edges passing the center at the same time. Another type has a movable knife, with one oblique or one curved edge, and the cutting is done in one direction only. The power for cutting with these instruments is supplied by pulling together two long handles which, in order to transmit a greater force, are generally so constructed that they act through the medium of a series of cogs. In dehorning with these instruments the cutting edges should be slipped down over the horn and the knives closed, so that their edges set firmly against the horn in such position that the cut will be made in the right place and in the right direction. The handles should then be drawn together with a quick, firm, strong pull so that the horn will be completely severed by the first act and without twisting.

Dehorning should, when possible, be performed in cool weather when the flies are not plentiful. The loss of blood from the operation is not sufficient, as a rule, to be of consequence, and after care being taken to prevent substances from getting into the openings left after the removal of the horns it is not usual to apply any dressing. Pine tar or a mixture of pine tar and tannic acid may be applied, particularly if the weather is warm.

SETONING.

The ordinary use of a seton is to keep up constant drainage from a cavity containing matter or to act as a stimulant or counterirritant. To insert a seton, the place of entrance and exit having been decided on, with the finger and thumb make a small fold of the skin transversely to the direction the seton is to be inserted, and cut it through, either with a sharp knife or a pair of scissors (this should be done at both the entrance and exit); then with a steady pressure and slight lateral movement insert the seton by means of a seton needle. (Pl. XXVII, figs. 1 and 2.) The seton should consist of a piece of strong tape, varying in breadth according to circumstances, and should be kept in place either by a knot on each end or by tying the ends together.

Setons should be gently moved once a day after suppuration is set up, and they should not be allowed to remain in over three weeks, or a month at the outside.

TRACHEOTOMY.

This operation consists in making an opening in the trachea, or windpipe. It is indicated whenever there is an obstruction from any cause in the upper part of the respiratory tract which threatens the death of the animal by asphyxia (suffocation). The mode of procedure is as follows: Have an assistant extend the animal's head as far as possible to make the trachea tense and prominent; make a longitudinal incision about 2 to 2-1/2 inches long through the skin and deeper tissues and trachea at the most prominent part of the trachea, which is about the middle or upper third, and then insert the tracheotomy tube. The latter should be removed once or twice daily and cleansed, and the wound dressed antiseptically. To ascertain when it is time to discontinue the use of the tube and to allow the wound to close, the hand should be held over the opening, which will require the animal to use its natural passages in breathing. Observe whether it is performed in a natural manner, and if so, remove the tube and allow the wound to close. Often the operation has to be performed in great haste without the proper instruments and under great disadvantages, the operator having to cut down quickly, open the trachea and spread the parts, using some instrument improvised by him at the time. This operation only gives the animal relief in breathing, and therefore the proper remedial treatment should be adopted at the onset of the attack and continued until the cause (the disease) has been overcome.

RUMENOTOMY.

The opening of the paunch, or rumen, in cattle and the removal of a part or the whole of the ingesta through said opening is termed rumenotomy. The operation should be performed in severe cases only, where the rumen is excessively overloaded and distended. The animal is placed with its right side against a wall and firmly held in position by strong assistants. The incision is made in the same place that the trocar is inserted for puncturing that organ in cases of hoven. The opening is increased in size until the operator's hand can be inserted into the rumen. Before any of the contents are removed from that organ a linen cloth should be placed from the outer wound into the rumen in order to prevent any of the ingesta from getting into the abdominal cavity. Some practitioners, after removing a portion of the contents of the rumen, introduce such medicine as may be indicated before closing the wound. Clean the wound and close the opening in the rumen with uninterrupted (Pl. XXVII, fig. 8) carbolized catgut sutures. Next close the external wound, consisting of the integument, muscle, and peritoneum, with stout, interrupted (Pl. XXVII, fig. 6) metallic sutures. No feed should be given for several hours after the operation, and then gruels only. (See "Distention of rumen or paunch with feed," p. 26.)

TREATMENT OF ABSCESSES.

An abscess may be detected, if situated externally, by heat, pain, redness, and swelling in the early stages, and, if further developed, by the fluctuation which is present. When any of these symptoms are absent, the suppuration should be encouraged by the means of hot fomentations and poultices. Care must be taken that the abscess is not opened too soon, or to some extent it may cause it to scatter, and the escape of pus will be lessened. The time to open an abscess is just before it is ready to break, and should be done with a sharp lance, a crucial incision sometimes being necessary. The cavity should be syringed out with an antiseptic solution. Care should be taken not to allow the wound to close too rapidly, to prevent which a tent of lint or oakum should be introduced.

WOUNDS.

For the purposes of the present work wounds may be divided into three classes: (1) Incised; (2) punctured; (3) lacerated or contused. In any wound all that the most suitable applications can accomplish is, in the first place, to prevent the access of those poisonous germs which exist in the animal's surroundings, such as the soil and the manure, and, in the second place, when the process of repair is for some reason temporarily inactive or altogether arrested, to incite that curative inflammation that is the invariable method by which the cure is effected.

INCISED WOUND.--This is one with clean-cut edges, and may be either superficial or deep. In wounds of all descriptions there is necessarily more or less bleeding, and this is especially liable to be the case in incised wounds, particularly when they penetrate to a considerable depth, or when inflicted on a part where blood vessels of any considerable size approach the surface. To arrest the hemorrhage must therefore be the first consideration. If slight, a generous use of cold water is all that is necessary, but if one or more vessels of any size have been wounded or entirely severed, they should be taken up and ligated. If the blood flows continuously and is dark in color, it proceeds from a vein, but if bright-colored and jerky in its flow, it is arterial.