Beware of ghosts, goblins and … golden retrievers?

If you’re planning to wear a costume this Halloween, be careful not to frighten Fido. James Cook, president of the American Veterinary Medical Association, warns that masks and disguises can be confusing and alarming for animals, and could increase the potential for dog bites.

“Dogs believe they are the guardians of their homes, and they can feel threatened if a stranger enters their space,” Cook said.

If your pet is stressed or nervous when the doorbell rings, prepare for trick-or-treaters in advance by finding a safe and comfortable place for your pet. Warn visitors to be alert and careful not to cause your pooch to panic.

And watch where you put all of that candy: Excessive chocolate can be dangerous for dogs, as well as the artificial sweetener Xylitol.

“Warn your children beforehand that table scraps are unhealthy for pets, and that candy can be deadly,” Cook said.