Can Dogs Eat Dark Chocolate (70-85% Cocoa)?
Dark chocolate is severely toxic to dogs because it contains high concentrations of theobromine and caffeine, methylxanthines that dogs metabolize extremely slowly. Even a small square can cause vomiting, diarrhea, racing heart, tremors, seizures, and potentially fatal cardiac arrhythmia. The darker and more bitter the chocolate, the greater the toxin load per gram. There is no safe dose threshold; all dark chocolate ingestion must be treated as a medical emergency. Immediate veterinary calculation of methylxanthine dose is essential.