Complications from consuming chocolate includes hypothermia, seizures, cardiac arrest, even death.
No antidote exists for chocolate poisoning in a dog, however you can try:
• Inducing vomiting within two hours of chocolate ingestion blocks its digestion.
• Activated charcoal given orally prevents absorption of chocolate during digestion.
• Seizure control medications, oxygen therapy, intravenous fluids and other measures mitigate the most serious effects of chocolate toxicity in a dog.
Chocolate Toxic Levels
A nibble of chocolate is not necessarily life threatening, but larger amounts can be. Theobromine is toxic to a dog if ingested in quantities of 100 to 150mg/kg. Theobromine content in milk chocolate is 6 mg/oz; in semi-sweet chocolate, 22 mg/oz; and,in baking chocolate, 35 to 45 mg/oz. Milk chocolate poses a relatively minor risk, but causes diarrhea in a dog, which must be treated all the same. To be on the safe side, an owner should never feed chocolate of any kind, in any amount, to a dog.