Witches, Ghosts and Goblins can be scary looking to a dog. Consider leaving him home while you take the children out trick or treating. If your dog spends much time outdoors, consider bringing him inside to keep him safe. He may bolt over or through the fence should he get frightened.
Chocolate is toxic to dogs.
Xylitol, the artificial sweetener found in many candies, is poisonous to dogs.
Ingesting any candy, cake, or wrappers can cause intestinal upset.
Open Doors: mean more chance of your dog slipping out. Place him in a crate with a stuffed Kong or bone to work on. If he is not crated trained or has not learned enough manners to remain behind a closed door of a bedroom either tether him or keep him on lead with you in attendance.
Jack-O-Lanterns: While fun to carve and have burning brightly, keep all knives safely out of reach of your dog. If you are using a candle, be cautious; your dog could easily knock it over.
Costumes: You may enjoy dressing up, but your dog may not appreciate it. A festive bandana around his neck, an interactive toy, a quiet place to relax and your pet will be safe for the night.