Is Chocolate Toxic to Cats and Dogs?
Chocolate is severely toxic to both cats and dogs because of theobromine. Dark and baking chocolate are most dangerous. Call a vet at once.
Potentially life-threatening — treat any exposure as an emergency.
Potentially life-threatening — treat any exposure as an emergency.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Chocolate?
Chocolate is severely toxic to both cats and dogs because of theobromine. Dark and baking chocolate are most dangerous. Call a vet at once.
Also known as: theobromine, cocoa, cacao, candy bar, baking chocolate.
Symptoms to Watch For
🐕 In Dogs
- Vomiting and diarrhea
- Restlessness, panting, and hyperactivity
- Rapid heart rate and tremors
- In serious cases: seizures, heart arrhythmias, collapse
🐈 In Cats
- Vomiting and diarrhea
- Agitation and elevated heart rate
- Tremors and muscle rigidity
- In serious cases: seizures and collapse
What to Do If Ingested
- Note the type of chocolate (dark/baking is worst) and amount eaten.
- Remove any remaining chocolate from reach.
- Call a veterinarian or poison hotline immediately — do not wait for symptoms.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- Any amount of dark, bakers, or cocoa was eaten
- Restlessness, panting, or tremors appear
- Vomiting, rapid breathing, or a racing heart
- Seizures or collapse
Frequently Asked Questions
Frequently Asked Questions
Why is chocolate toxic to pets?
Chocolate contains theobromine (and caffeine), which dogs and cats metabolize far more slowly than humans. It builds up and overstimulates the heart, muscles, and nervous system, causing vomiting, tremors, a racing heart, and in serious cases seizures.
Which chocolate is most dangerous?
The darker and more concentrated, the worse. Baking chocolate and high-percentage dark chocolate contain the most theobromine, followed by dark, then milk, then white (which has very little). Even small amounts of dark or baking chocolate can be an emergency for a small pet.
How much chocolate is an emergency?
It depends on the chocolate type, the amount, and your pet's weight. Dark or baking chocolate, or any amount that causes symptoms, is an emergency. Call a veterinarian or poison hotline right away with the type and amount eaten.
What are the first signs of chocolate poisoning?
Vomiting, diarrhea, restlessness, panting, and a fast heart rate often show up within a few hours, followed by tremors or seizures in serious cases. Do not wait for symptoms to worsen before calling.
Sources
This entry is reviewed against the following authoritative veterinary sources.
- ASPCA — People Foods to Avoid Feeding Your Pets
- Merck Veterinary Manual — Toxicology
- Pet Poison Helpline — Poisons
Last reviewed: 2026-07-11