This section is from the book "Everything About The Dogs", by Alvin George Eberhart. Also available from Amazon: Everything About Dogs.
Symptoms: Acute pain, causing the dog to utter sharp cries; frequent twitchings and jerkings of the head and limbs, the fore and hind legs are drawn towards each other, the back is arched; the fits of cramp and twitching are intermittent, but are readily brought on by a touch or a sudden noise. Foaming at the mouth is another and frequent symptom.
Antidotes: Give an emetic at once, mustard and hot water, coffee, salt and hot water; give lard, or any fat, in considerable quantities.
"The following has saved many valuable dogs poisoned by strychnine and will save any dog if breath is Left in body. As soon as the owner is convinced that the dog has strychnine, or dog button (nux vomica), symptoms of which are readily detected by spasms and rigid spine, give fifteen drops of homeopathy tincture of belladonia (green root). Give same dose after each spasm. If dog is too far gone to swallow, inject thirty drops in rectum. The second dose can be given by mouth. It is seldom the third dose is necessary." This I copied from letter sent to the American Field by some sportsman who had been out hunting with his pointer. He further wrote: "When I reached him he had had some twelve spasms and was rigid, tongue cold, eyes turned, etc. Three doses brought the dog out and some thirty quail were killed over him the next day."
Here are also other antidotes that are used in cases of poisoning: Strychnine is most commonly used to poison dogs, and if noticed when taken sick, or even after violent convulsions have set in, they can almost invariably be saved by injecting under the skin, with hypodermic syringe, 10 grain doses of chloral (dissolved in water) every 15 or 20 minutes until 50 or 60 grains are used.
If convulsions quiet down and dog seems better, It might be safe to stop when 30 or 40 grains have been given.
It will pay any one owning a number of dogs to keep a hypodermic syringe.
Dent says: The best antidote for strychnine poisoning is chloral hydrate, size of dose depends upon the condition of the dog; in health the dose is 5 to 20 grains.
Dog poisoning is so prevalent In many parts of the country just now, it may not be out of place to reproduce part of Mr. A. J. Sewell's (the noted English veterinarian) article on this subject in the Kennel Gazette (Eng.), so that dog owners may be prepared for such emergencies:
"In all cases of poisoning, more especially when due to strychnia, prompt action is required and means should be at once taken to make the dog disgorge what has been swallowed. An emetic that will act well and quickly must be at once administered; for this there is nothing better than a dose of apomorphia. This medicine acts in two ways; it is the quickest and surest emetic, and besides it relieves the spasms. The dose is the eighth of a grain for small dogs, and about the quarter of a grain for the large ones, given in a teaspoonful of water; but the best way of administering it is by injecting it under the skin with a hypodermic syringe - than from three to eight minims of the one in fifty solutions is to be given.
"I always advise persons who keep a number of valuable dogs to have a solution of apomorphia by them ready for emergency, for while it is being obtained the patient may die, and if huntsmen would always carry a small bottle of solution with them, many a valuable hound's life might be saved. When this medicine is not at hand some other emetic must be given. Ordinary table salt can be always quickly procured, and from one teaspoonful to a tablespoonful, according to the size of the dog, should be given in warm water. If the dose does not act freely, repeat it in a few minutes, or, instead, give from five to twenty grains of powdered ipecacuanha, or from one to three grains of tar emetic. Either of these may be shaken dry on the tongue; the dog must be made to vomit somehow, but anything like salt requiring a quantity of water is often difficult to administer, as the dog's mouth is often tightly clenched and trying to open it induces a paroxysm, during which time it is impossible to give anything by the mouth, and here the advantage of the subcutaneous injection of apomorphia comes in. This may also be repeated in a quarter of an hour if the vomiting has not been free. Besides the emetic some medicine is necessary to relieve the spasm. Fro this there is nothing better than chloral and bromide of potassium. From fifteen grains to two scruples of each may be given in from one to three tablespoonfuls of water If the dog can be made to swallow, and half the quantity of each may be given again in twenty or thirty minutes and repeated, if necessary, in half an hour. When the dog is unable to swallow, from three to ten minims of nitrite of amyl held to the nose on a pocket handkerchief is useful. This may be repeated In a quarter of an hour, or chloroform may be given. Also Inject into the rectum from one-half to two drams of laudanum, in from on to four tablespoonfuls of water, which repeat in a quarter of an hour, and again in another fifteen minutes if the paroxysms continue. After, the severe symptoms have passed and the dog is weak and prostrate, from one-half to two teaspoonfuls of brandy added to some milk may be administered and repeated every hour for a time.)'
 
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