Potatoes can be toxic to canines when ingested raw as they contain solanine. Potatoes are only safe for consumption when cooked. Some of the common symptoms of potato poisoning in dogs can include vomiting and diarrhea, low energy, abdominal pain, and irregular heart rate or weak pulse. If your pup has already eaten a raw potato, watch out for uncharacteristic restlessness and difficulty walking or standing as well. In extreme cases, symptoms can progress to seizures and can even result in death if not treated immediately by a veterinarian.