Chocolate poisoning in cats involves theobromine toxicity, similar to dogs. Cats are relatively less likely to eat large amounts due to lacking sweet taste receptors, but when they do, the methylxanthines cause cardiac and neurological effects.
How This Causes Poisoning in Cats
Theobromine inhibits adenosine receptors and phosphodiesterases, causing cardiac stimulation, CNS excitation, and diuresis. Cats process theobromine slowly, allowing toxic accumulation.
The toxic threshold in cats is approximately 200mg of theobromine per kg. Dark chocolate has ~150mg/oz — meaning 1.5oz of dark chocolate could be dangerous for a typical 10 lb cat.
| Chocolate Type | Theobromine/oz | Toxic for 10 lb Cat | Risk |
|---|---|---|---|
| Baking Chocolate | ~390mg | <0.5oz | EXTREME |
| Dark (70%+) | ~150mg | ~1oz | HIGH |
| Milk Chocolate | ~60mg | ~2.5oz | MEDIUM |
| White Chocolate | <1mg | Very large amounts | LOW |
Symptoms to Watch For
GI Signs
Vomiting, diarrhea, restlessness.
Cardiac Effects
Rapid heart rate, excessive urination.
Severe Cases
Tremors, seizures in high-dose exposure.
Recovery
With treatment, most cats recover fully.
What Vets Will Do
If within 2 hours: induced vomiting may be recommended. Activated charcoal to prevent further absorption. IV fluids, heart rate monitoring, anti-seizure medication if needed. Most cats recover with prompt treatment.
🚨 What To Do Right Now
Time is critical — every hour matters with cat poisoning.
Frequently Asked Questions
The toxic dose is ~200mg theobromine per kg. For a 10 lb (4.5 kg) cat, that's ~1oz of dark chocolate.
Likely a small risk for a typical-sized cat, but call Poison Control to confirm based on the exact amount and type.
Cats lack sweet taste receptors (TAS1R2 gene is non-functional) and don't seek sweet foods. But curious cats may nibble chocolate left out.
White chocolate has very low theobromine (<1mg/oz) but high fat content, which can cause GI upset and pancreatitis in some cats.
Induced vomiting if recent, activated charcoal, IV fluids, and cardiac monitoring. Most cases resolve well with prompt care.