Dogs are attracted to rat poison for the same reason rats are--it tastes good to them. Although it may be colored to designate otherwise, rat poison often comes in pellets similar in shape in appearance to pet food. Because dogs have little color vision, they may mistake the poison for kibble. If you suspect your dog has eaten rat poison, take action immediately. Rat poison is fatal in many dogs.
Advice
Call your veterinarian or an emergency veterinary clinic immediately if you suspect your dog has eaten rat poison. Tell them what has happened and ask for advice. If you can't reach a veterinarian, call the American Society for the Prevention of Cruelty to Animal's poison control hotline at 888-426-4435. You may be instructed to induce vomiting, but that will depend upon what type of rat poison your dog ate, how long it has been since your dog ate the poison and how far you are from the clinic.
Emergency
Get your dog to a veterinarian immediately. Most rat poisons are anticoagulants, meaning that symptoms may not be immediately obvious. Because of this do not wait for your dog to show symptoms if you suspect the pet has eaten rat poison. After it has had time to act, the poison causes internal bleeding. The first symptoms you may notice will include bruising, nosebleeds, sore joints, bloody vomit and bloody stool.
Treatment
The veterinary clinic may continue efforts to induce vomiting, if the dog ingested the rat poison just a short time earlier. If the poison is already working on the dog's system, vitamin K is the antidote. Vitamin K is given as an injection at the clinic and you will likely be sent home with vitamin K tablets to continue giving the dog. A blood transfusion may be necessary if internal bleeding has already started and your pet has had significant blood loss.
Read more: What Should You Do If Your Dog Eats Rat Poison? | eHow.com http://www.ehow.com/way_5859212_should-dog-eats-rat-poison_.html#ixzz1HeShd0Rs
The taste that attracts rats to poison will also attract dogs, and many rat poisons come in pellets that resemble dog kibble. While the poison may be colored to distinguish that it's not pet food, dogs have little color vision and may eat the poison because they think it is pet food. In addition to eating the actual poison, a dog may eat a rodent--or the body of a dead rodent--that has been poisoned. If you suspect your dog has eaten rat poison, or a poisoned rodent, get your pet to a veterinarian immediately.
Veterinarian
The more information you can give the veterinarian--such as the date and time you suspect the dog ate the rat poison, as well as the exact type of poison--will be helpful in treating your dog. If you can provide an actual sample of the suspected poison, that will be the best. Call the veterinarian's office before you leave, as she may instruct you to induce vomiting at home and then bring the dog to the clinic.
Symptoms
If you suspect your dog has eaten rat poison, don't wait for symptoms to develop before contacting a veterinarian. Rat poisons cause internal bleeding and the chance to save your dog's life may have already passed by the time you see signs of poisoning. Symptoms include the dog refusing to eat, blood in the dog's saliva, bright green stool, bloody urine, extreme sensitivity to light, bloody stool, fatigue, drooling, breathing difficulty, diarrhea and bleeding from the gums, nose or rectum.
Treatment
Once you arrive at the clinic, the veterinarian may start or continue to induce vomiting. The dog may receive fluids, have its stomach pumped or be given activated charcoal. Vitamin K1 is the treatment most often given as an antidote to rat poisoning in dogs. The poison hinders the dog's ability to formulate Vitamin K1, which is necessary for blood clotting.
Prevention
The best prevention is to not use rat poisons in your home and to not allow your dog access to areas where others may have used the poisons. Even if you keep the poisons out of reach of your pets, the animals may find a dead or dying poisoned rodent, which they can ingest. If you do have to use some type of rodent control, try a method that will be less dangerous to your pets. Keep your dog on a leash or in a fence when outside to prevent the pet from accessing areas where others may have used poisons.
Read more: What Should I Do If My Dog Eats Rat Poison? | eHow.com http://www.ehow.com/way_5873646_should-dog-eats-rat-poison_.html#ixzz1HeTIIwGt
I'm so, so sorry. I hope this helps, and good luck with your dog, she's in my prayers. :)