Can cats eat chocolate? Absolutely not. Do not feed your cat chocolate. Chocolate contains caffeine and cocoa which contain a chemical called theobromine. Theobromine is poisonous to cats and dogs. Eating chocolate can be fatal for cats.
Dark chocolate and unsweetened baking chocolate are particularly bad because they contain high levels of theobromine. Eating chocolate can cause vomiting, diarrhea, liver damage or liver failure, tremors, and seizures.