Verdict: No, toxic
Chocolate is highly toxic to cats due to methylxanthines like theobromine and caffeine, which they cannot metabolize efficiently. Even small amounts can cause severe symptoms, ranging from gastrointestinal upset to seizures and heart problems. If your cat consumes any amount of chocolate, it is a veterinary emergency requiring immediate attention.
Methylxanthines (theobromine and caffeine) are stimulants that affect the central nervous system, cardiovascular system, and respiratory system. Cats metabolize these compounds much slower than humans, leading to their accumulation and toxic effects.
Theobromine, Caffeine