Instantly assess if your dog is at risk after eating chocolate. Calculate theobromine dose per kg, get a toxicity risk level, and know exactly what to do next.
Based on veterinary toxicity data for white, milk, dark, baking, and cocoa powder chocolate. Accounts for dog weight, age, and time since ingestion.
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Risk level, symptoms, and next steps
Chocolate contains two compounds that are toxic to dogs: theobromine and caffeine. While humans can metabolize these substances quickly, dogs process them much more slowly. A dog's body takes 17–20 hours to eliminate half of the theobromine they ingest, compared to just 2–3 hours in humans. This slow metabolism allows toxic levels to build up, affecting the heart, central nervous system, and kidneys.
The severity of chocolate poisoning depends on three factors: the type of chocolate (darker = more dangerous), the amount consumed, and your dog's body weight. A small dog eating a single square of baking chocolate could face a life-threatening emergency, while a large dog eating the same amount of milk chocolate may only experience mild symptoms.
The LD50 (lethal dose for 50% of dogs) for theobromine is approximately 100–200 mg/kg. However, clinical symptoms often appear at much lower doses — around 20 mg/kg for mild effects and 40 mg/kg for more serious signs. Early recognition and veterinary treatment significantly improve outcomes.
Common signs of chocolate poisoning include vomiting, diarrhea, restlessness, hyperactivity, rapid breathing, increased heart rate, tremors, seizures, and in severe cases, collapse or death. Symptoms usually appear within 6–12 hours but can start as early as 1–2 hours after ingestion with high doses.
If you suspect your dog has eaten chocolate, the most important step is to act quickly. Use this calculator to estimate the risk, then contact your veterinarian immediately. Do not attempt home remedies like inducing vomiting unless specifically directed by a vet — this can cause aspiration pneumonia in some cases.
No — that rule is outdated. Dogs age rapidly in their first two years (≈15 then ≈9 human years), then the rate depends on size. Small dogs age about 4 human years per dog year, while giant dogs age about 7 human years per dog year after year 2.
Symptoms typically appear within 6–12 hours of ingestion, but can begin as early as 1–2 hours with high doses. Theobromine is absorbed quickly from the stomach and small intestine. Vomiting may occur within the first hour. Watch for restlessness, rapid breathing, and tremors.
It depends on the dog's size and the type of chocolate. For a 10 kg dog, as little as 20g of baking chocolate or cocoa powder can be dangerous. Dark chocolate is about half as toxic as baking chocolate per gram. Milk chocolate requires larger amounts — roughly 100g for a 10 kg dog to reach moderate risk. White chocolate has negligible theobromine.
1. Estimate the amount and type of chocolate consumed. 2. Use a chocolate toxicity calculator or call your vet immediately. 3. Do NOT induce vomiting unless specifically instructed by a veterinarian — it can cause aspiration in some cases. 4. Keep your dog calm and monitor for symptoms. 5. If directed, go to an emergency vet clinic immediately.
Dogs metabolize theobromine (and caffeine, which is also in chocolate) much more slowly than humans. A dog's body takes 17–20 hours to eliminate half of the theobromine they ingest, while humans clear it in 2–3 hours. This slow metabolism allows theobromine to build up to toxic levels in dogs.
Yes. Puppies have immature liver function and are smaller relative to the dose, making them more vulnerable. Senior dogs have reduced organ function and slower metabolism, which extends the time theobromine remains active in their system. Both groups should be treated with extra caution.
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Important Medical Disclaimer
This tool provides estimates based on general veterinary data and is for informational purposes only. Individual dogs may react differently based on health conditions, medications, and metabolism. Always contact a veterinarian immediately if you suspect your dog has consumed chocolate. Do not rely solely on this calculator for medical decisions. In an emergency, call your vet or an animal poison control center immediately.