Look for blue, purple, white, brick colored or extremely bright red gums or tongue. Seek immediate medical attention for a heart rate over 180 beats per minute. Take your dog’s temperature, which should not be over 102.5 degrees Fahrenheit (39.2 Celsius). Notice if your dog is losing its balance or appears disoriented. Look for vomiting and diarrhea. Be alert to heavy panting lasting longer than 30 minutes or wheezing. Notice any sudden appetite loss. Take your dog to a veterinarian if you suspect poisoning.