Dogs should not eat licorice candy because it can be harmful. Black licorice contains a compound called glycyrrhizin, which can cause dangerous spikes in blood pressure and water retention in dogs, especially those with heart or blood pressure issues. Red licorice, while it typically lacks licorice extract, contains sugar and other ingredients that are unhealthy for dogs and can lead to problems like obesity, diabetes, and dental issues. Pure licorice root may have some medicinal benefits for dogs in controlled doses prescribed by a vet, but licorice candy or products made for humans are not safe for dogs to consume.

If a dog eats licorice candy, it is important to monitor for symptoms such as vomiting, diarrhea, excessive drooling, or lethargy, and consult a veterinarian immediately.