Verdict: No, toxic
Chocolate is toxic to dogs due to the presence of theobromine and caffeine, which they cannot metabolize efficiently. Even small amounts can cause significant illness, and larger ingestions can be fatal. If your dog has eaten chocolate, contact your veterinarian or an emergency animal hospital immediately.
Theobromine and caffeine are methylxanthines that dogs metabolize much slower than humans, leading to accumulation in the system. They act as stimulants, affecting the central nervous system, cardiovascular system, and gastrointestinal tract.
Theobromine, Caffeine