The darker, the more dangerous — about 10 g of dark chocolate causes signs in a 4 kg cat.
Don't.
Theobromine and caffeine are broken down very slowly by cats and overstimulate the heart and nerves. Signs can start around 20 mg theobromine per kg, heart effects around 40 mg/kg and seizures around 60 mg/kg. Dark chocolate has 5–16 mg per gram, so about 10 g can affect a 4 kg cat. Cats can't taste sweetness so they rarely seek it out, but licking cocoa powder or chocolate milk happens.
Dangerous for every cat, with or without a health condition.
| Calories | 528 kcal |
|---|---|
| Protein | 6 g |
| Fat | 36 g |
| Carbohydrate | 46 g |
| Phosphorus | – mg |
| Sodium | 0 mg |
| Potassium | – mg |
Source: Korea MFDS Food Nutrient Database — 다크초콜릿
Milk chocolate has about 2 mg theobromine per gram, so a lick is unlikely to cause signs. Still watch heart rate and vomiting for 12 hours.
