✕ Toxic

Chocolate

Chocolate is one of the most dangerous foods for cats. It contains theobromine and caffeine, two compounds that can overstimulate a cat’s nervous system and heart. Cats break down these substances much more slowly than humans, so even a small amount can build up in their body and cause poisoning. Symptoms may include vomiting, diarrhea, restlessness, rapid heartbeat, tremors, and seizures. In severe cases, chocolate poisoning can lead to dangerous abnormal heart rhythms or death. Dark chocolate, baking chocolate, and cocoa powder contain the highest levels of theobromine and are the most dangerous. For cats, even about 2 grams of dark chocolate may cause serious harm, so if a cat eats any chocolate, contact a veterinarian as soon as possible.

Important Notes

Symptoms: Vomiting and diarrhea within 2–4 hours; followed by agitation, rapid heart rate, excessive thirst and urination; escalating to muscle tremors, hyperthermia, cardiac arrhythmias, and grand mal seizures; in severe cases: respiratory failure and death.

2 grams can cause serious harm: Smaller than one standard chocolate square — even crumbs from baked goods should be taken seriously.

Action: Veterinary emergency. Contact a vet immediately even for small exposures.

Danger by type (most to least): Dry cocoa powder > baker's chocolate > dark/semisweet chocolate > milk chocolate > white chocolate (virtually no theobromine).

Potentially Toxic Parts

Seed

Powder

Possible Symptoms Reported in Cats

Severe Neurological Overstimulation

Gastrointestinal · 6 to 12 hours (progresses as the toxins are absorbed into the bloodstream)

Cardiovascular Dysfunction

Cardiac · 6 to 12 hours

Respiratory Distress

Respiratory · 6 to 12 hours

Hyperthermia

Gastrointestinal · Mid to late stage (6 to 12 hours)

Gastrointestinal Upset (Vomiting and Diarrhea)

Gastrointestinal · 2 to 12 hours (often the initial symptoms to manifest)

Increased Thirst and Urination (Polydipsia and Polyuria)

Renal · 2 to 12 hours (often follows initial gastrointestinal signs)

Disclaimer: This summary was compiled from multiple sources and is for informational use only. It is not a diagnosis or treatment plan. Toxicity can vary based on the substance, amount, plant part, and individual cat. If you think your cat may have been exposed to a toxic substance, contact a veterinarian right away.