Can Dogs Eat Chocolate? What to Do
No, chocolate is toxic to dogs. It contains theobromine and caffeine, substances that affect the heart and nervous system, and the more cocoa it has, the more dangerous it is: cocoa powder and baking chocolate are the worst and white chocolate the least risky. If your dog ate chocolate, call your veterinarian and have your dog's weight and the approximate amount ready.
Quick summary
- Risk depends on your dog's weight and the type of chocolate: cocoa powder and baking chocolate are the most dangerous.
- About 20 mg of methylxanthines per kilo can cause mild signs; 40 to 50 mg/kg, effects on the heart.
- Signs usually start 6 to 12 hours later.
- Call your vet with your dog's weight and the amount handy.
Why is chocolate toxic to dogs?
Dogs process theobromine and caffeine (called methylxanthines) very slowly, so they build up in the body. According to the Merck Veterinary Manual, this can cause dangerous heart rhythm problems, tremors and seizures. The high fat content of chocolate can also trigger pancreatitis.
How much chocolate is dangerous?
It depends on two things: your dog's weight and the type of chocolate. The Merck Veterinary Manual says about 20 mg of methylxanthines per kilogram (9 mg per pound) can cause mild signs (vomiting, diarrhea, thirst), 40 to 50 mg/kg can affect the heart and from 60 mg/kg seizures can appear. Each type of chocolate provides a different amount:
| Type of chocolate | Methylxanthines per ounce | Amount that reaches 20 mg/kg in a 22 lb (10 kg) dog |
|---|---|---|
| Cocoa powder | 807 mg | about 0.25 oz (a teaspoon) |
| Baking chocolate (unsweetened) | 440 mg | about 0.45 oz |
| Dark or semisweet chocolate | 150 to 160 mg | about 1.3 oz (two squares) |
| Milk chocolate | 64 mg | about 3.1 oz (a small bar) |
| White chocolate | 1.1 mg | very large amounts; can still cause problems from fat and sugar |
The values come from the Merck Veterinary Manual table and vary by brand, and the calculations are approximate. To estimate your dog's case from weight and chocolate type, use our dog chocolate toxicity calculator. It is guidance while you talk to your vet, not a diagnosis.
What signs does it cause and when?
- First hours: thirst, vomiting, diarrhea, restlessness and a bloated belly. Usually 6 to 12 hours after eating it.
- If more serious: hyperactivity, frequent urination, wobbliness, stiffness, tremors and seizures.
- Heart: very fast or irregular heartbeat, rapid breathing, fever.
- Signs can last up to 72 hours in severe cases.
What should I do if my dog ate chocolate?
- Remove the chocolate and keep the wrapper so you know the type and amount.
- Write down the time and your dog's weight.
- Call your veterinarian or an emergency clinic right away; do not wait for signs, because they can take hours.
- Do not induce vomiting or give home remedies unless a veterinarian tells you to.
According to the Merck Veterinary Manual, if the dog has no signs yet, treatment includes inducing vomiting under professional control and giving repeated doses of activated charcoal, and if signs are already present, tremors, seizures and heart rhythm are stabilized.
When to see a vet: whenever your dog has eaten cocoa powder, dark or baking chocolate, or a significant amount of any chocolate; and immediately if there is vomiting, tremors, seizures, a racing heart, heavy thirst or restlessness. Also if the chocolate had raisins, macadamia nuts or coffee.
What if it was just a little?
A crumb of a chocolate chip cookie is not usually a problem for a large dog, but it is still better to call. In small dogs, a few grams of dark chocolate can already matter. To avoid accidents, keep Easter eggs, candy and gift chocolates out of reach, especially at Christmas and during parties. See other kitchen dangers in our guide to toxic foods for dogs.
How do I keep my dog from eating chocolate?
- Store chocolate and cocoa powder in a closed cabinet, not in bags or on the table.
- Watch Christmas, Easter and birthday gifts: boxes of chocolates are a classic emergency room story.
- Ask guests and children not to give your dog "just a little."
- Close the trash can tightly, where wrappers and dessert leftovers can end up.
- If your dog is very food-driven, train a "drop it" cue and use safe rewards.
Frequently asked questions
Is white chocolate safe for dogs?
It has insignificant amounts of theobromine, but it is not recommended: the fat and sugar can cause digestive problems.
How long does it take to work?
Signs usually start 6 to 12 hours after eating it and can last up to 72 hours in severe cases.
Are cats poisoned by chocolate too?
Yes, the ASPCA warns that chocolate is dangerous to dogs and cats. Call your vet if your cat tried it.
What about coffee and energy drinks?
Caffeine is one of the two methylxanthines in chocolate, so coffee and caffeinated products are also dangerous.
What if I do not know how much chocolate was eaten?
Work out the worst case: count how many pieces are missing or check the weight of the empty package, and give that to your vet. With that information they will decide whether to act.
If your dog ate grapes or raisins instead, read Can Dogs Eat Grapes or Raisins?.
If you want your dog's weight, allergies and your vet's contact always at hand in an emergency, you can keep it all in the MyPet app.
Sources
Original source: merckvetmanual.com