Poisonous food for your dog:
Chocolate – is a top ingestion problem at Halloween. Chocolate contains Theobromine, which can be harmful and sometimes fatal to your dog. Baking chocolate is exceptionally high in this chemical. The general rule of thumb is the darker the chocolate, the more danger it poses. If your pet consumes chocolate contact your veterinarian immediately.
Candies and Gum – The biggest concern with candy is the ingredient called xylitol. Xylitol is a sugar alcohol commonly used as an artificial sweetener and is toxic to pets. This ingredient is often used in sugar-free items but has been found in more and more foods even when they are not labelled as sugar-free.
Hard Candies – Large amounts of hard candies and gum can clump up in the stomach and cause a risk of obstruction. Goes without saying, keep all treats out of reach of dogs.
Raisins – Some treats and bakery items can include raisins or grapes which are toxic to dogs and can cause renal failure. If you suspect your dog consumed raisins, please call your veterinarian immediately.
Costumes
Dog costumes and dressing dogs up in outfits has increased over the years. Never purchase costumes for pets that have dangling parts or pieces that can be chewed off. Also, beads, snaps, buttons, ribbons, elastic and fabric can all be intestinal hazards. Moreover, with certain costumes your pet can result in overheating, impaired vision, and even difficulty breathing if it covers the face or is too tight around the pet’s neck or chest. Never leave your dog unattended while he’s wearing clothing or other decorative items
Safety first
Take your dog for a long walk while it's still light and tire them out. Before the trick-or-treating starts, put your pets in a quiet room where they will be safe from all the Halloween activity. Make a den for them with favourite toys, treats and play calming music (or white noise to mask the outside commotion). If your pet is especially sensitive, leave the treat box outside with a "do not knock" sign. That way trick or treaters can still get their candy and your dog isn't disturbed by the noise.
Don't leave your dog unattended outside even if you have a fencened off garden. And make sure your pet is wearing a proper ID tag and the details on their microchip have been updated. It is unlikely your dog will manage to escape or run off scared but if it does you have a better chance of getting them back safely if you can be reached on as many contact information as possible.
There's a variety of products available to keep pets calm, from sprays to support vests. Do some research, try them out in advance to make sure they work for your dog and hopefully it'll be another thing to rely on which keeps your dog calm and happy.
Wishing you and your dog a happy and safe Halloween!