Answer: Dead dog.
This is a hard way to start an article to be read by dog lovers, but the reality is this: If you are not prepared to treat poisoning resulting from ingesting a toxic substance, you lose. Not only do you lose, but your dog dies. Acute poisoning requires accurate assessment. The threat is not only related to the potency of the poison, but also to the quantity consumed, the duration of exposure, and to the presence of other active ingredients, such as adjuvant and solvents. The difference between immediate appropriate action and delayed response is the difference between life and death. To this end, the authors advocate that a significant effort be made to be prepared for what might happen, given the environment in which you keep your animals. Being prepared means not only having antidotes and treatment materials on hand, but it means being familiar with the signs and symptoms of poisoning, and knowing what risks are in your dog's environment.
The first step in treating poisoning is prior knowledge. You have to be able to recognize that there has been a poisoning. Symptoms vary significantly from animal to animal, from substance to substance and with the amount ingested. You must be accurate in your differential diagnosis. To treat based on the wrong diagnosis is to increase the probability of death. The second step intreating poisoning is prior knowledge. You have to know the poisons that are in your dog's environment. So many potential poisons are readily available, it is truly amazing more dogs are not poisoned. The third step in treating poisoning is prior knowledge. You must know the immediate actions required, which can include artificial respiration/resuscitation. If you are picking up on a trend here, it is intentional. Because there may be little time in which to reflect on or to research the subject, or to find a veterinarian because of time of day, or distance from a veterinary facility, etc., the owner who is not equipped with the knowledge of the symptoms, the effects of various poisons, and what treatment regimen goes with what poison, stands a very good chance of losing the dog. Remember, also, that not all poisonings are accidental.