Chocolate contains theobromine and caffeine, both of which dogs metabolize far more slowly than humans. Even small amounts of dark chocolate can cause vomiting and seizures. No amount of chocolate is safe for dogs.
Why Is This Toxic to Dogs?
Chocolate contains theobromine, a methylxanthine compound that dogs cannot metabolize efficiently. It accumulates in their system causing cardiovascular and neurological damage. The darker the chocolate, the higher the theobromine concentration.
The toxic dose depends on the type of chocolate and your dog's body weight. Baking chocolate and dark chocolate are dramatically more dangerous than milk chocolate or white chocolate.
| Chocolate Type | Theobromine Content | Toxic Amount (10 lb dog) | Risk Level |
|---|---|---|---|
| Baking Chocolate | ~390 mg/oz | < 0.5 oz for 10 lb dog | EXTREME |
| Dark Chocolate (70%+) | ~150 mg/oz | ~1 oz for 10 lb dog | HIGH |
| Milk Chocolate | ~60 mg/oz | ~2.5 oz for 10 lb dog | MEDIUM |
| White Chocolate | <1 mg/oz | Very large amounts | LOW |
Symptoms to Watch For
Watch for these signs and call your vet immediately if any appear:
Early Signs
Vomiting, diarrhea, drooling, restlessness. Best window for treatment.
Worsening
Increased urination, muscle twitching, rapid heart rate.
Severe Toxicity
Tremors, seizures, heart arrhythmias. Hospitalization required.
Critical / Recovery
With treatment, most dogs begin recovering. Fatal without care at high doses.
🚨 What To Do If Your Dog Was Exposed
Frequently Asked Questions
As little as 20mg of theobromine per kg body weight causes mild signs. Severe toxicity occurs at 40–50mg/kg. A 10 lb dog can be affected by just 1 oz of dark chocolate.
Symptoms can take 6–12 hours to appear. Don't assume 'seems fine' means 'is fine.' Call Poison Control immediately — early treatment is most effective.
Symptoms typically last 24–72 hours. Theobromine has a half-life of 17.5 hours in dogs.
Most dogs recover fully with prompt veterinary treatment. Prognosis is excellent when treated within 2 hours of ingestion.
Vomiting, diarrhea, restlessness, excessive urination, and muscle twitching are early warning signs.