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Chocolate Toxicity in Dogs & Cats

Chocolate can be dangerous for pets because it contains methylxanthines, mainly theobromine and caffeine. The level of risk depends on the type of chocolate involved, how much was eaten, and your pet’s body weight. If you are unsure at any point, it is always reasonable to phone us. Most triage calls are quick and help remove uncertainty during what is usually a stressful moment.

I have a pet emergency

When to treat this as urgent

If your pet is shaking, having tremors or seizures, collapsing, panting excessively, has a very fast or irregular heartbeat, or seems extremely agitated or distressed, this should be treated as an emergency.

Many cases we see involve small amounts of chocolate that owners did not realise were dangerous. This calculator helps you understand when chocolate exposure is likely to be low-risk and when it needs immediate veterinary advice.

Chocolate Toxicity Calculator

Use the calculator below to estimate risk based on your pet’s weight and the chocolate type and amount. This provides a general guide only and should never delay calling if your pet looks unwell.

Takurua Vets — Chocolate Toxicity Calculator

%
If provided, we estimate methylxanthines as 15.5 mg/g × (% cocoa / 100).
hours
Used for advice only (not the dose calculation).
Symptoms present?
Vomiting, agitation, tremors, fast heart rate, seizures, collapse.

Reviewed by Dr Ebeneze Spamers, Lead Veterinarian at Takurua Vets (NZVC-registered).

Talk to us about poisoning concerns

If your dog or cat may have eaten chocolate and you are unsure how urgent it is, our team can help you work out what to do next.

I have a pet emergency

Related pages

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Pet Emergency Signs and What To Do Now

Use this if chocolate exposure is part of a bigger concern, or if your pet is showing symptoms that may need urgent care.

Emergency Signs Guide

1 Ilam Road, Upper Riccarton
Christchurch
Canterbury 8041
New Zealand