Chocolate Toxicity In Dogs
If your dog has eaten chocolate, one of the first questions to ask is: how much chocolate is dangerous for a dog?
Chocolate contains a chemical called theobromine, which dogs cannot metabolise efficiently. Even small amounts can cause poisoning depending on your dog’s weight and the type of chocolate eaten.
Use this veterinary chocolate toxicity calculator to estimate the risk of poisoning in dogs based on their body weight, the type of chocolate eaten and the amount consumed.
Thankfully, not all dogs will need a visit to the vet; many can get by with some care at home.
If you are unsure or your dog is showing symptoms, our veterinarians are available 24/7 online to help assess the situation.
If your dog is showing signs such as vomiting, restlessness, tremors or seizures, contact a veterinarian immediately. Do not wait for results.
Chocolate Toxicity Calculator for Dogs
Estimate risk based on your dog’s weight, chocolate type, and amount consumed.
YourVetOnline.com
Calculate Chocolate Toxic Dose For Dogs
This Chocolate Toxicity Calculator can be used as a guide to decide whether your dog needs to see a veterinarian.
While every effort is made to ensure the calculations are correct, this diagnostic tool is a guide only.
Our vets are available 24/7 to provide animal poison advice.
Even if your dog is not showing symptoms of chocolate poisoning, please monitor your dog for any changes for at least 12 hours (see below for clinical signs to watch out for).
How To Make Dog Vomit
If the calculator shows that your dog has consumed too much chocolate, check out our article on how to make your dog vomit.
Of course, our vets are online 24/7 if you need more help or advice.
Why Does Chocolate Kill Dogs?
Dogs love chocolate, but unfortunately, they can’t metabolise it as effectively as we can.
The half-life of theobromine in dogs is approximately 17–18 hours, meaning it can take several days to fully clear (metabolise) from the body.
The chemical toxicity in chocolate is due to the methylxanthines theobromine and caffeine. (Theobromine being by far the most important).
Cats are also susceptible to theobromine toxicity, but poisoning is uncommon because cats lack sweet taste receptors and rarely consume chocolate.
Signs Of Chocolate Poisoning In Dogs?
It can take 6–12 hrs after ingestion for clinical signs of chocolate toxicosis to become apparent.
Initial signs that you may notice include:
- vomiting
- diarrhoea
- bloating
- increased restlessness
- drinking a lot
As signs progress we will often see:
- hyperactivity
- wobbliness (ataxia)
- increased urination (polyuria)
- elevated heart rate (tachycardia) and cardiac arrhythmias such as ventricular premature contractions)
- rigidity
- tremors
- seizures
- hyperthermia
- hypokalaemia (low blood potassium)
- coma
- death
Because many chocolate products are high in fat, some dogs may develop pancreatitis after consuming large amounts.
What Chocolate Is The Most Toxic To Dogs?
Not all chocolate contains the same amount of theobromine.
As a general rule we say:
The darker the chocolate the more dangerous it is
The amount of theobromine in different types of chocolate is shown here:
| Type Of Chocolate | Theobromine Content |
| Cocoa bean mulch | 2-28mg/g |
| Cocoa beans | 10.6-53mg/g |
| Dry cocoa powder | 14-26mg/g |
| Unsweetened baker’s chocolate | 13.7-15.9mg/g |
| Dark semisweet | 4.7mg/g |
| Milk chocolate | 1.5-2.11mg/g |
| White chocolate | 0.008mg/g |
While some might argue that it can be safe to give your dog a small chocolate treat, a far safer alternative would be to give your dog ‘pet chocolate’ that doesn’t contain the toxic theobromine.
How Much Chocolate Is Toxic To A Dog?
The amount of chocolate that can kill a dog depends on the amount of theobromine and caffeine that it contains.
The dose of both caffeine and theobromine that will kill 50% of animals that consume it (i.e. LD50) is estimated to be around 100–200 mg/kg.
Occasionally severe clinical signs and death can occur at much lower dosages so it appears that individual sensitivity to methylxanthines can vary between individuals.
For this reason, we recommend that even if your dog is not showing any signs or even subtle signs, you continue to monitor them closely for at least 12 hours.
| Effect | Approx theobromine dose |
|---|---|
| GI signs | ~20 mg/kg |
| Cardiac signs | ~40–50 mg/kg |
| Seizures | ~60 mg/kg |
| Potentially lethal (LD50) | ~100–200 mg/kg |
How Does A Vet Treat Chocolate Poisoning?
If a vet decides that your dog has ingested a toxic amount of chocolate then it’s important to start immediate decontamination.
Your dog will be made to vomit.
Depending on the amount eaten, they may then be made to eat activated charcoal.
Activated charcoal assists with the absorption of chocolate toxins so that the toxins aren’t able to be absorbed and metabolised.
If signs of poisoning are more progressed a vet may need to place your dog on IV fluids to increase diuresis (urine outflow) to aid decontamination.
Relaxants such as Methocarbamol or Diazepam may be required to prevent or treat tremors and seizures.
Heart medications may be required to lower the heart rate and prevent arrhythmias or hypotension.
For the majority of cases decontamination by inducing vomiting will be enough.
Vomiting should only be induced if ingestion occurred within two hours and the dog is not showing neurological signs. In some situations, inducing vomiting at home may be unsafe, so veterinary advice is recommended.
Your dog will still likely have some sort of stomach upset such as diarrhoea but in general, the prognosis for recovery is excellent.
Frequently Asked Questions About Chocolate Poisoning In Dogs
How much chocolate is toxic to a dog?
Chocolate toxicity depends on the amount of theobromine consumed relative to your dog’s body weight. Mild signs may occur at doses around 20 mg per kg, while serious poisoning can occur above 60 mg per kg. Our chocolate toxicity calculator estimates risk based on your dog’s weight and the type of chocolate eaten.
What should I do if my dog eats chocolate?
If your dog eats chocolate, first estimate the amount eaten and the type of chocolate. Dark chocolate and cocoa powder are much more toxic than milk chocolate. Use the calculator above to estimate risk. If your dog shows signs such as vomiting, restlessness, tremors or seizures, contact a veterinarian immediately.
How long after eating chocolate do symptoms appear in dogs?
Signs of chocolate poisoning usually appear within 6 to 12 hours after ingestion. Early signs may include vomiting, diarrhoea and restlessness. More severe poisoning can cause tremors, seizures and heart rhythm abnormalities.
Can a small amount of chocolate hurt a dog?
Small amounts of milk chocolate may cause only mild stomach upset in many dogs, especially larger breeds. However, darker chocolate products contain much higher levels of theobromine and can be dangerous even in small quantities. Always monitor your dog for at least 12 hours after ingestion.
Is white chocolate toxic to dogs?
White chocolate contains very little theobromine and is unlikely to cause poisoning. However, it still contains fat and sugar which may cause stomach upset or pancreatitis if eaten in large amounts.
How do veterinarians treat chocolate poisoning in dogs?
Treatment usually involves early decontamination. A veterinarian may induce vomiting and administer activated charcoal to reduce toxin absorption. In more severe cases dogs may require IV fluids, heart monitoring and medications to control tremors or seizures.
How accurate is a chocolate toxicity calculator?
A chocolate toxicity calculator provides a useful estimate of risk based on known toxic doses of theobromine. However it should only be used as a guide. If your dog is showing clinical signs or you are unsure about the amount eaten, seek veterinary advice immediately.
Find out about other potential pet poisons in our article Top Dangers For Pets In Autumn.
Our vets can help you with steps you can take at home to induce vomiting and advise whether it would be best to take your dog to a veterinarian.
My 5 lb 10 yr old morky ate 1 choclate
covered peaut. it was dark chcolate coverrd.
Thanks Dr Leigh! Have shared this great info to Bayside Dog Owners Group on FB. Happy Easter to you! Kate x