mucous or villous
, where the work of digestion properly commences, the mouths of numerous little vessels opening upon it, which exude the gastric juice, to mix with the food already softened, and to convert it into a fluid called the
chyme
. It is a simpler apparatus than in the horse or in cattle. It is occasionally the primary seat of inflammation: and it almost invariably sympathises with the affections of the other intestines.
The successive contractions of each portion of the stomach, expose by turns every portion of the alimentary mass to the influence of the gastric juice, and each is gradually discharged into the alimentary canal.
As
the chyme is formed, it passes out of the other orifice of the stomach, and enters the first intestine or
duodenum
.
It may be naturally supposed that this process will occasionally be interrupted by a variety of circumstances. Inflammation of the stomach of the dog is very difficult to deal with. It is produced by numerous different causes. There is great and long-continued sickness; even the most harmless medicine is not retained on the stomach. The thirst is excessive; there are evident indications of excessive pain, expressed by the countenance and by groans: there is a singular disposition in the animal to hide himself from all observation; an indication that should never be neglected, nor the frequent change from heat to cold, and from cold to heat.
The mode of treatment is simple, although too often inefficient. The lancet must be immediately resorted to, and the bleeding continued until the animal seems about to fall; and to this should quickly succeed repeated injections. Two or three drops of the croton oil should be injected twice or thrice in the day, until the bowels are thoroughly opened. The animal will be considerably better, or the disease cured, in the course of a couple of days.
There
is a singular aptitude in the stomach of the dog to eject a portion of its contents; but, almost immediately afterwards, the food, or a portion if not the whole of it, is swallowed again. This is a matter of daily occurrence. There is a coarse rough grass, ihe
cynosaurus cristatus
, or crested dog's-tail. It is inferior for the purposes of hay, but is admirably suited for permanent pastures. It remains green after most other grasses are burnt by a continuance of dry weather. The dog, if it be in his power, has frequent recourse to it, especially if he lives mostly in a town. The dry and stimulating food, which generally falls to his share, produces an irritation of his stomach, from which lie is glad to free himself; and for this purpose he has recourse to the sharp leaves of the cynosurus. They irritate the lining membrane of the stomach and intestines, and cause a portion of the food to be occasionally evacuated; acting either as an emetic or a purgative, or both. They seem to be designed by nature to be substituted for the calomel and tartar emetic, and other drugs, which are far too often introduced.
An
interesting
case of the retention of a sharp instrument in the stomach is related by Mr. Kent of Bristol.
On the 23d of February, Mr. Harford, residing in Bristol, when feeding a pointer-dog, happened to let the fork tumble with the flesh, and the dog swallowed them both. On the following morning, Mr. Kent was desired to see the animal; and, although he could feel the projection of the fork outwardly, which convinced him that the dog had in reality swallowed it, yet, as he appeared well, and exhibited no particular symptoms of pain or fever, Mr. Kent gave it as his opinion that there was a possibility that he might survive the danger, and the animal was sent to him, in order to be more immediately under his care. The treatment he adopted was, to feed him on cow's liver, with a view to keep the stomach distended and the bowels open; and he gave him three times a day half a pint of water, with sufficient sulphuric acid to make it rather strongly sour to the human tongue, with the intention of assisting the stomach in dissolving the iron.
On the following Sunday, the skin, at the projecting point, began to exhibit some indication of ulceration; and on Monday a prong of the fork might be touched with the point of the finger, when pressed on the ulcer. Mr. Kent then determined on making an effort to extract the fork on the following morning, which he accordingly did, and with but little difficulty, assisted by a medical friend of the owner. The dog was still fed on cow's liver; his appetite remained good, and with very little medical treatment the external wound healed. The animal improved rapidly in flesh during the whole time. He left the infirmary in perfect health, and remained so, with one inconvenience only, a very bad cough, and his being obliged to lie at length, being unable to coil himself up in his usual way.
The fork was a three-pronged one, six and a half inches long. The handle, which was of ivory, was digested: it was quite gone; and either the gastric fluid or the acid, or both conjointly, had made a very apparent impression on the iron.
Dogs occasionally swallow various strange and unnatural substances. Considerable quantities of hair are sometimes accumulated in the stomach. Half-masticated pieces of straw are ejected. Straw mingled with dung is a too convincing proof of rabies. Dog-grass is found irritating the stomach, or in too great quantities to be ejected, while collections of earth and dung sometimes threaten suffocation. Pieces of money are occasionally found, and lead, and sponge. Various species of polypus irritate the coats of the stomach. Portions of chalk, or stone, or condensed matters, adhere to each other, and masses of strange consistence and form are collected. The size which they assume increases more and more. M. Galy relates an extraordinary account of a dog. It was about three years old when a tumour began to be perceived in the flank. Some sharp-pointed substance was felt; the veterinary surgeon cut down upon it, and a piece of iron, six inches in length, was drawn out.
The following fact was more extraordinary: it is related by M. Noiret. A hound swallowed a bone, which rested in the superior part of the œsophagus, behind the pharynx, and caused the most violent efforts to get rid of it. The only means by which it could be made to descend into the stomach was by pushing it with the handle of a fork, which, escaping from the hand of the operator, followed the bone into the stomach. Two months afterwards, on examining the stomach, the fork was plainly felt lying in a longitudinal direction, parallel with the position of the body; the owner of the dog wishing mechanically to accelerate the expulsion of this body, endeavoured to push it backwards with his hands. When it was drawn as far back as possible, he inserted two fingers into the anus, and succeeded in getting hold of the handle, which he drew out nearly an inch; but, in order to be enabled fully to effect his object, it was necessary to make an incision into the rectum, and free the substance from every obstacle that could retain it. This he did not venture to do, and he was therefore compelled to allow the fork to pass back into its former position.
About three months after the accident, M. Noiret made an incision, three inches from above to below, and the same from the front backwards. He also made an incision through the muscular tissue. Having arrived at the peritoneum, he made another incision, through which he drew from the abdomen a part of the floating portion of the large intestines, and introduced his fingers into the abdominal cavity. He seized the handle of the fork, which was among the viscera, and free about half-way down, and drew it carefully towards the opening made in the flank. The other half of the fork was found to be closely enveloped by the origin of the mesocolon, which was red, hard, and inflamed. The operator freed it by cutting through the tissues which held the fork, and then drew it easily out. The animal was submitted to a proper course of treatment, and in three weeks afterwards was perfectly cured.
The food, having been converted into chyme by the digestive power of the stomach, soon undergoes another and very important change. It, or a portion of it, is converted into
chyle
. It is mixed with the bile and a secretion from the pancreas in the duodenum. The white thick liquid is separated, and contains the nutritive part of the food, and a yellow pulpy substance is gradually changed into excrement. As these substances pass on, the separation between them becomes more and more complete. The chyle is gradually taken up by the lacteals, and the excrement alone remains.
The
next of the small intestines is the
jejunum
, so called from its being generally empty. It is smaller in bulk than the duodenum, and the chyme passes rapidly through it.
Next
in the list is the
ileum
; but it is difficult to say where the jejunum terminates and the ileum commences, except that the latter is usually one-fifth longer than the former.
At
the termination of the ileum the
cæcum
makes its appearance, with a kind of valvular opening into it, of such a nature that everything that passes along it having reached the blind or closed end, must return in order to escape; or rather the office of the cæcum is to permit certain alimentary matters and all fluids to pass from the ileum, but to oppose their return.
The
colon
is
an
intestine of very large size, being one of the most capacious, as well as one of the longest, of the large intestines. It commences at the
cæsum caput coli,
and soon expands into a cavity of greater dimensions than even that of the stomach itself. Having attained this singular bulk, it begins to contract, and continues to do so during its course round the cæcum, until it has completed its second flexure, where it grows so small as scarcely to exceed in calibre one of the small intestines; and though, from about the middle of this turn, it again swells out by degrees, it never afterwards acquires its former capaciousness; indeed, previously to its junction with the rectum, it once more materially differs in size.
At the upper part of the margin of the pelvis the colon terminates in the
rectum
, which differs from the cæcum and colon by possessing only a partial peritoneal covering, and being destitute of bands and cells. It enlarges towards its posterior extremity, and is furnished with a circular muscle, the
sphincter ani
, adapted to preserve the
anus
closed, and to retain the fæculent matter until so much of it is accumulated in the rectum as to excite a desire to discharge it.
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a disease of great fatality, often depends upon the condition of the stomach; but it is not frequent in dogs.
Why the dog is so little subject to
tetanus
, or lock-jaw, I am unable to explain. Sportsmen say that it sometimes attacks him when, being heated in the chase, he plunges into the water after the stag. The French give it the name of
mal de cerf
, from stags being supposed to be attacked in a similar way, and from the same cause. In the course of nearly forty years' practice, I have seen but four cases of it. The first arose from a wound in the foot. The cause of the second I could not learn. In both the spasmodic action was dreadful as well as universal. The dogs lay on their sides, the neck and legs stretched out, and the upper legs kept some inches from the ground by the intensity of the spasm. They might be taken up by either leg, and not a portion of the frame change its direction. At the same time, in their countenances, and by their hoarse cries, they indicated the torture which they endured.
In the third case, which occurred 12th June, 1822, the head was drawn permanently on one side, and the whole body formed a kind of bow, the dog walking curiously sideways, often falling as it walked, and frequently screaming violently. I ordered him to be well rubbed with an ammoniacal liniment, and balls of tonic and purging medicine to be given twice in the day. The dog gradually recovered, and was dismissed cured on the 20th.
On the 16th November, in the same year, a bull-terrier had a similar complaint. He had been tried in the pit a fortnight before, and severely injured, and the pain and stiffness of his joints were increasing. The head was now permanently drawn on one side. The dog was unable to stand even for a moment, and the eyes were in a state of spasmodic motion. He was a most savage brute; but I attempted to manage him, and, by the assistance of the owner, contrived lo bleed him, and to give him a physic-ball. At the same time I advised that he should be destroyed.
His master would not consent to this; and, as the dog occasionally ate a little, we contrived to give a grain each of calomel and opium every sixth hour. In the course of three days he was materially recovered. He could stand, but was exceedingly weak, I ordered the calomel lo be omitted, but the opium to be continued. Three days aflerwards he was sent into the country, and, as I heard, perfectly recovered.
The following is a very interesting case of tetanus, detailed by M. Debeaux, of the Royal French Chasseurs:
A favourite dog was missing. Four days had passed, and no intelligence could be obtained with regard to him until he returned home, fatigued and half-starved. He had probably been stolen. In the excess of their joy, the owners crammed him with meat until he became strangely ill. His throat was filled with froth, the pupils of his eyes were dilated, the conjunctiva was strongly injected, his neck was spasmodically contracted, and the spine of the back was bowed, and most highly sensible to the touch. M. Debeaux was sent for; it was an hour before he could attend. The dog was lying on his belly; the four limbs were extended and stiff. He uttered the most dreadful and prolonged howling every two or three minutes. The surgeon ordered the application of a dozen leeches to the chest and belly; laxative medicines were given, and embrocations applied to the spine and back.
Three days passed, and the symptoms evidently augmented. The excrement was dark and fetid, and the conjunctiva had a strong yellow tint. Leeches were again employed; emollient lotions and aperient medicines were resorted to. The sensibility of the spine and back was worse than ever; the animal lay on his belly, stretching out his four limbs, his neck fixed, his jaws immovable, his voice hoarse, and he was utterly unable to move.
The bathings, lotions, and aperients were continued, with very few intermissions, until the 14th day, when the muscles began to be a little relaxed; but he cried whenever he was touched. On the 15th, for the first time, he began to eat a little, and his natural voice returned; still, however, the spasms occasionally appeared, but very much mitigated, and on the 20th the pain had entirely ceased.
On
the 5th of the next month he travelled two leagues with his master. It was cold, and the snow fell. On his reaching home, all the horrible spasms returned, and it was eleven days before he was completely cured
1
.
Mr
. Blaine gives the following account of his experience of this disease:
"It is remarkable, that although dogs are subject to various spasmodic affections, yet they are so little subject to lock-jaw that I never met with more than three cases of it among many thousands of diseased dogs. Two of these cases wereidiopathic; one being apparently occasioned by exposure to cold air all night; the other the cause was obscure. The third was of that kind calledsympathetic, and arose from extreme injury done to one of the feet. In each of these cases the convulsive spasm was extreme, and the rigidity universal but not intense. In one case the jaw was only partially locked. Both warm and cold bathings were tried. Large doses of opium and camphor were given by the mouth, and also thrown up in clysters. The spine of one was blistered. Stimulating frictions were applied to all, but in neither case with any salutary effect."2
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Enteritis
, or inflammation of the intestine, is a disease to which dogs are very liable. It may be produced by the action of several causes. The intestines of the dog are peculiarly irritable, and subject to take on inflammatory action, and this tendency is often much increased by the artificial life which they lead. It is a very frequent complaint among those dogs that are much petted. A cold temperature is also a common cause of disease in these dogs.
I was consulted with regard to a dog who was hiding himself in a cold, dark corner, paved with stone. Every now and then he lifted his head and uttered a howl closely resembling that of a rabid dog. He fixed his gaze intently upon me, with a peculiarity of expression which many would have mistaken for rabid. They, however, who have had the opportunity of seeing many of these cases, will readily perceive the difference. The conjunctiva is not so red, the pupil is not so dilated, and the dog appears to implore pity and not to menace evil.
In this state, if the dog is approached, he will not permit himself to be touched until he he convinced that no harm is intended. A peculiar slowness attends each motion; his cries are frequent and piteous; his belly hot and tender; two cords, in many cases, seem to run longitudinally from the chest to the pubis, and on these he cannot bear the slightest pressure. He abhors all food; but his thirst for water, and particularly cold water, is extreme; he frequently looks round at his flanks, and the lingering gaze is terminated by a cry or groan. In the majority of cases there is considerable costiveness; but, in others, the bowels are freely opened from the beginning.
The
peritoneal inflammation is sometimes pure, but oftener involves the muscular coat of the intestines. Its prevailing cause is exposure to cold, especially after fatigue, of lying on the wet stones or grass. Now and then it is the result of neglected rheumatism, especially in old and petted dogs.
The treatment is simple. Bleed until the pulse falters, put the animal in a warm bath, and let the belly be gently rubbed while the dog is in the water, and well fomented afterwards; the drink should consist of warm broth, or warm milk and water. The bleeding should be repeated, if little or unsatisfactory relief is obtained; and the examination of the rectum with the finger, and the removal of any hardened faeces that may have accumulated there, and the cautious use of enemata, neither too stimulating nor too forcibly injected, should be resorted to. No medicine should be employed until the most urgent symptoms are abated. Castor oil, the mildest of our purgatives — syrup of buckthorn assisting the purgative property of the oil, and containing in its composition as much stimulating power as is safe — and the spirit of while poppies — the most convenient anodyne to mingle with the other medicines — will generally be successful in allaying the irritation already existing, and preventing the development of more. Even this must not be given in too large quantities, and the effect must be assisted by a repetition of the enemata every fifth or sixth hour. On examination after death the nature of the disease is sufficiently evident: the peritoneum, or portions of it, is highly injected with blood, the veins are turgid, the muscular membrane corrugated and hardened, while often the mucous membrane displays not a trace of disease. In violent cases, however, the whole of the intestines exhibit evidence of inflammation.
I
was much gratified a few years ago in witnessing the decided manner in which Professor Spooner expressed himself with regard to the treatment of enteritis in the dog.
"I should deem it advisable," said he, "to administer a purgative; but of what would that consist? Calomel? Certainly not. I was surprised to hear one gentleman assert that he should administer it to the extent of from five to ten grains, and another to say that he should not hesitate to exhibit a scruple of calomel to a dog, and to all carnivorous animals. I should never think of exhibiting it as a cathartic. I should only administer it in small doses, and for the purpose of producing its specific effect on the liver, which is the peculiar property of this drug. Given in larger doses it would not be retained, and if it got into the intestines it would act as a powerful drastic purgative."3
In our treatment of the horse we have got rid of a great proportion of the destructive urine-balls and drastic purgatives of the farrier. The cow is no longer drenched with half-a-dozen deleterious stimulants. A most desirable change has been effected in the medical treatment of these animals. Let us not, with regard to the dog, continue to pursue the destructive course of the keeper or the huntsman.
The
following case of enteritis, with rupture of the colon, may be useful:
On
March 15, 1840
, I was requested to attend a large dog of the bull breed, three years old, who had not appeared to be well during the last four or five days.
I had scarcely arrived ere I recognised it to be a case of enteritis. He had a dreadful shivering fit, to which succeeded heat of the skin and restlessness. The muzzle was dry and hot, as also was the tongue. The eyes were sunken and redder than usual; the breathing was accelerated, but not very laborious; the extremities were cold, while the surface of the body was hot and painful to the touch. The bowels were constipated, and had been so during the last week; some dung however was evacuated, but it was hard and dry, and in small quantities. The pulse was quick, but full; and there was a slight pain and considerable irritation in the rectum. I took from him [Symbol: ounce] x. of blood before the desired effect was produced, and then gave him
tinct. opii gr. xiv., et spt. ether, nit. gutt. viij., cum ol. ricini
[Symbol: ounce]
iij
., and an opiate enema to allay the irritation of the rectum. This was about
8 o'clock, A.M
.
11 A.M
. — The bowels have not been moved, and the pain is more intense; his countenance expresses great anxiety; he frequently lies on his stomach, and the pulse is small but quick. I gave him a little broth, and ordered the abdomen to be fomented with hot flannels.
2 P.M.
— He has had distressing sickness, and is extremely anxious for water. I introduced my finger into the rectum, but could not discover any hardened fæces. Enemata, composed of
mag. sulphas
and warm water, were frequently thrown into the intestines; as soon as one came away another was thrown up.
4 P.M
. — No better: gave him
pulv. aloes
[Symbol: ounce] j.;
calomel, gr. vj. et pulv. opii gr. viij.
The fomentations to be continued, and the abdomen rubbed with a
lin. terebinthinæ
.
5 P.M
. — A great change has taken place within the last hour; the hind extremities are paralysed; the mouth and ears are cold; the pulse is more hurried and irregular, and almost imperceptible; the respiration is laborious and irregular, as is the pulse; and the dog is frequently sick. To be kept quiet.
6 P.M.
— Another change: he lies panting and groaning piteously; his limbs are bathed in sweat, with convulsive struggles. At twenty minutes past six he died.
A post-mortem examination presented general marks of inflammation; the small intestines were extremely red, while the large ones were in a gangrenous state and most offensive, with a rupture of the colon. I did not expect to meet with the rupture, and am at a loss to account for it. The liver was of a pale ashen colour, and very light. I put a piece of it into some water, and it floated on the surface. The other contents of the abdomen did not show the slightest appearance of disease.
September 2d, 1843
. — A black pug-bitch, 18 months old, was yesterday taken violently sick; the vomiting continued at intervals the greater part of the day, and she had not eaten during the last 24 hours. I could not possibly get at her, on account of her ferocity: as she had not had the distemper, and as I was misled by her age and the watery discharge from her eyes, and as she had had several motions yesterday, I imagined that the attack might be the beginning of that disease. Learning that she was fond of sweet things, I prepared an emetic containing a grain of calomel and a grain of tartar emetic: she took it readily, and I promised to call on the following day.
Sept. 3
. — The weakness at the eyes had disappeared, but there had been no motion. On getting at her by main force I found her belly very tense and rather hot: she had again been sick, was very eager for water, and still refused to eat. The disease was now evident. As she appeared too unmanageable for anything else, I produced a physic-ball, in giving which I was bitten.
Six hours afterwards I again went: no fæces had passed: I administered two enemas, the second of which was returned with a small quantity of hardened fæces and an intolerable smell. I ordered the water to be removed, and broth to be substituted.
Sept. 4.
— The dog is in good spirits, has eaten heartily, and had no motion, probably because it was habitually cleanly, and had not been taken out of doors. Her owner considered her as quite well, and dismissed me. Three days afterwards a servant came to say that all was going on very well.
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Chronic inflammation of the
peritoneal membrane
is a frequent disease among dogs. The animal loses his appetite and spirits; he sometimes eats a little and sometimes not; he becomes thin, his belly is tucked up, and when we closely examine him we find it contracted and hard, and those longitudinal columns of which I have already spoken are peculiarly dense and almost unyielding. He now and then utters a half-suppressed whine, and he occasionally seeks to hide himself. In the greater number of cases he after a while recovers; but he too often pines away and dies. On examination after death the case is plain enough. There is inflammation of the peritoneal membrane, more indicated by undue congestion of the bowels than by the general blush of the membrane. The inflammation has now spread to the muscular coat, and the whole of the intestine is corrugated and thickened.
There is another peritoneal affection, aggravated by combination with a rheumatic tendency, to which the dog is more disposed than any other domesticated animal. It has its most frequent origin in cold, or being too much fed on stimulating and acrid food, and probably from other causes which have not yet been sufficiently developed.
Here also no drastic purgative is to be admitted; it would be adding fuel to fire: not a grain of calomel should be used, if the life of the animal is valued. The castor oil mixture will afford the most certain relief, a drop or two of the oil of peppermint being added to it
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The dog is also subject to fits of
colic
, principally to be traced to improper food, or a sudden change of food, or exposure to cold. This is particularly the case with puppies. There is no redness of the eye, no heat of the mouth, no quickened respiration; but the animal labours under fits of pain. He is not quiet for a minute. He gets into one corner and another, curling himself closely up, but he does not lie there more than a minute or two; another fit of pain comes on; he utters his peculiar yelp, and seeks some new place in which he may possibly find rest.
It is with considerable diffidence that I offer an opinion on this subject contrary to that of Mr. Blaine. He states that the treatment of this species of colic is seldom successful, and that which has seemed the most efficacious has been mercurial purgatives; namely, calomel one grain, aloes a scruple, and opium a quarter of a grain, until the bowels are opened. I have seldom found much difficulty in relieving the patient suffering under this affection; and I gave no aloes nor calomel, but the oleaginous mixture to which I have so often referred. I should not so much object to the aloes, for they constitute an excellent purgative for the dog; nor to a dog that I was preparing for work, or that was suffering from worms, should I object to two or three grains of calomel intimately mixed with the aloes: from the combined effect of the two, some good might be obtained.
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Many persons have a very foolish custom of throwing stones, that their dogs may dive or run after them, and bring them to their owner's feet: the consequence is, that their teeth are soon worn down, and there are too many cases on record in which the stone has been swallowed. It has been impeded in its progress through the intestinal canal, inflammation has ensued, and the animal has been lost, after having suffered the most dreadful torture.