Few animals are so exposed to the vengeance of some miscreant, or so much in the way of accidental poisoning, as the dog. The poisons usually given, or picked up by chance, are arsenic, corrosive sublimate, and nux vomica, and there is seldom any remedy. The two first are attended by excruciating colicky pains, and a discharge of blood by stool. When this last symptom appears there is no hope.

The poison of lead may be combated. Dogs are fond of licking new paint, on account of the oil which it contains, and perhaps the sweetness of the lead. They often likewise lap water that has long stood in paint-pots that have been carelessly suffered to stand about The symptoms are the crying and moaning of the animal, his anxious countenance, his peculiarly tucked up and corded belly, and an excessive degree of costiveness.

The bowels must-be opened - particularly with calomel, in order that a chemical decomposition may take place. The lead that has been received into the stomach or intestines has a strong affinity for the chlorine with which the mercury is combined; and a salt of lead, the chloride or muriate, is formed, which is not or a poisonous character, while the mercury is left free, and also harmless, in the stomach or bowels. The opening of the bowels may be assisted in the first place by the aperient mixture, the anodyne in which will likewise sheathe the inflamed membrane of the bowels; but the chief dependence is to be placed on the calomel, which will combine with the lead, and render it innocuous.

The dog is seldom without worms; but except they exist in large quantities they do little harm There are four varieties of worms jn dogs.

The first is a small worm, two or three inches long, sharpened at both ends, and of a somewhat hard structure. This is usually found in the stomach of puppies. Occasionally they are vomited, either singly or rolled, into masses. They have been found in the trachea, where they have produced a great deal of irritation and a most distressing cough, and they are very much concerned in the production of the fits of young dogs.

If one of these worms is accidentally discovered, an emetic should be given, and then a physic-ball (Recipe No. 1, p. 138).

The next kind of worm is the long round worm, re-sembling that in the horse. This seldom produces irritation or disease unless it exists in great numbers.

In order to expel this worm. a. physic-ball should be given on every-fourth morning; and on each of the intermediate days, and an hour before the dog has any thing to eat, one of the following balls should be "given, weighing from three-quarters of a drachm to two drachms, according to the size of the dog.

Recipe (No. 32). Worm Balls

Take - Carbonate of iron, half an ounce; Ethiop's mineral, one drachm; Gentian, an ounce; Ginger, half an ounce; Levigated glass, an ounce; Palm-oil, nine drachms: Beat them well together, and keep them in a covered jar for use.

The third kind of worm is one of a singular kind. It is composed of a multitude of joints, three or four hundred of them, and each joint capable of becoming a perfect worm. It is sometimes three or four feet in length, and probably occupies the greater part of the length of the intestinal canal. At the upper end is a narrow neck, terminating in a small head furnished with suckers or tentacula, by means of which the animal adheres firmly to the intestine. Even when the bowels are in a manner filled by the worm, - for sometimes two or three exist there at the same time, - it is singular how little inconvenience the dog suffers. The bowels will be so occupied by them that there does not seem to be comfortable room for the whole of these parasites, and joint after joint is detached, and crawls from the anus, about half an inch in length, and flat; and yet the dog is in perfect health.

It is very difficult to detach and expel this worm, and it is necessary that the whole of it should be detached; for if only the little neck and head remain the reptile will grow again, so as once more to fill the bowels. The worm-ball just recommended seems to be the only thing that has power to effect its destruction. The rough filings of the tin irritate and wound the skin of the worm, and cause it by degrees to detach itself from its hold, and to be carried on by the peristaltic motion of the bowels, increased by the physic-ball, which is periodically given.

The last worm is the ascaris, or.thread-worm, inhabiting the lower intestine. These are not, except they exist in large quantities, injurious to health, but they often tease the dog by the itching which they occasion about the anus. Medicine has comparatively little effect upon them, but the readiest way to expel them is to inject some linseed-oil and solution of aloes up the rectum.

For worms, generally speaking, the following may be regarded as a sovereign remedy; and there are few-cases which it will not effectually cure.

Recipe (No. 33)

Linseed-oil, half a pint; Oil of turpentine, two drachms. Repeat the dose, if necessary.