First: Don't Panic, But Do Act
If you're reading this because your dog just ate some chocolate, take a breath — most chocolate emergencies are manageable, especially if you act quickly. We'll cover exactly what to do in a moment. But first, let's understand why chocolate is toxic to dogs at all, because it's genuinely interesting science and it helps explain why some chocolate is more dangerous than others.
The Culprit: Theobromine (and Caffeine)
Chocolate contains a compound called theobromine, a methylxanthine stimulant also found in tea, kola nuts, and some energy drinks. Humans metabolise theobromine efficiently — it's part of why chocolate gives us a mild mood lift. Dogs, however, process it far more slowly. In their bodies, theobromine builds up to toxic levels much faster than in ours.
Chocolate also contains caffeine, another methylxanthine, which compounds the effect. Together, these compounds overstimulate a dog's nervous system and cardiovascular system.
Which Chocolates Are Most Dangerous?
The key variable is theobromine concentration, which is highest in dark chocolate and lowest in white chocolate:
- Dark chocolate and baking chocolate — the most dangerous. A single ounce of dark chocolate per pound of body weight can be toxic. A small dog eating even one square of good dark chocolate warrants a vet call.
- Milk chocolate — lower theobromine levels, but still dangerous in any meaningful quantity. A 10kg dog eating a standard chocolate bar (around 40–50g) may show symptoms.
- White chocolate — contains almost no theobromine, as it's made from cocoa butter rather than cocoa solids. It's not technically "safe" — the high fat and sugar content can cause digestive upset and pancreatitis — but theobromine toxicity is not the primary concern.
- Cocoa powder — extremely concentrated. One of the most dangerous forms for dogs.
Symptoms of Chocolate Poisoning in Dogs
Symptoms typically appear within 6–12 hours of ingestion and may include:
- Vomiting and diarrhoea
- Excessive thirst and urination
- Restlessness, hyperactivity, or pacing
- Muscle tremors or seizures
- Rapid or irregular heartbeat
- In severe cases: collapse
What to Do If Your Dog Eats Chocolate
1. Stay calm and gather information
Find out: what type of chocolate, approximately how much, and your dog's weight. This will help the vet assess severity.
2. Contact your vet immediately
Don't wait for symptoms to appear. Call your vet or, out of hours, an emergency vet line such as Animal PoisonLine (01202 509 000) — note they're based in Bournemouth, making them very familiar to us locally. There's a small consultation fee, but the advice can be life-saving.
3. Do not induce vomiting unless instructed
Some sources suggest this — but only do it under veterinary guidance. Incorrect induction of vomiting can cause additional harm.
4. Follow vet advice precisely
Treatment may include inducing vomiting (at the clinic), activated charcoal to limit absorption, IV fluids, or monitoring overnight.
A Note on Keeping Brownies Safe at Home
At Bournemouth Brownie Company, our brownies are made for humans — rich with Callebaut Belgian dark chocolate. They're absolutely not safe for dogs. If you've ordered a box and have curious pets at home, keep brownies in their packaging, out of reach, or in the fridge with the door shut. The same applies to any high-quality dark chocolate product.
For humans though? Shop our brownie boxes and enjoy — you can process theobromine just fine.
The Bottom Line
- Dark chocolate is the biggest risk to dogs
- White chocolate carries minimal theobromine risk but is still not good for dogs
- If in doubt, call a vet — it's always better to check
- Keep your brownie boxes well out of your dog's reach
Your dog will survive missing out on the brownies. Whether they'll forgive you for eating them in front of them is another matter entirely.
