Halloween is a favorite night in Arlington’s neighborhoods, from the busy streets around Arlington Center to the side streets of the Heights and East Arlington. For dogs, though, the real excitement often starts after the trick-or-treating ends, when a bag of candy is left within reach.
Every fall, veterinary clinics see a rise in pets who have gotten into Halloween treats. This guide from Arlington Animal Clinic explains which candies are most dangerous, what to do if your dog or cat eats something they should not, and how to keep the celebration safe.
The Most Dangerous Halloween Treats for Pets
Chocolate
Chocolate contains theobromine and caffeine, which dogs process very slowly. Dark chocolate and baking chocolate are the most dangerous, but a large amount of milk chocolate can also cause problems, especially in small dogs. Signs include vomiting, restlessness, a racing heart, tremors, and in severe cases, seizures.
Sugar-Free Candy and Gum (Xylitol)
Xylitol, a sweetener found in many sugar-free gums, mints, and candies, is one of the most dangerous items a dog can eat. Even small amounts can cause a sudden drop in blood sugar and can lead to liver failure. Check labels for xylitol, which may also be listed as birch sugar.
Raisins and Chocolate-Covered Raisins
Grapes and raisins can cause sudden kidney failure in some dogs, and there is no known safe amount. Snack boxes of raisins are a common Halloween handout.
Wrappers, Sticks, and Packaging
Dogs who gulp candy often swallow wrappers and lollipop sticks too. These can cause choking or block the intestines, which may require surgery.
Nuts and High-Fat Treats
Macadamia nuts can cause weakness and tremors in dogs. Rich, fatty treats can trigger pancreatitis, a painful inflammation of the pancreas.
What to Do If Your Dog Ate Halloween Candy
- Stay calm and remove any remaining candy.
- Figure out what was eaten. Gather wrappers and estimate how much is missing
- Note your pet’s weight, since toxicity depends on body size
- Call right away. Contact us during business hours, a 24-hour emergency hospital after hours, or the ASPCA Animal Poison Control Center at (888) 426-4435
- Do not make your pet vomit unless a veterinarian tells you to
Many candy toxicities are very treatable when caught early, sometimes before symptoms even begin. Waiting to see what happens often makes treatment harder.
Other Halloween Risks for Pets
- An open front door. Frequent doorbells can frighten pets and create escape opportunities. Keep anxious pets in a quiet room
- Costumes. Make sure costumes do not limit breathing, sight, or movement, and never leave a costumed pet unsupervised
- Candles and jack-o’-lanterns. Curious cats and wagging tails can knock them over
- Glow sticks. The liquid inside is usually not highly toxic, but it tastes bitter and can cause heavy drooling
- Decorations. Fake cobwebs, small props, and cords can be swallowed or chewed
Make sure your pet’s microchip information is up to date and they are wearing an ID tag, just in case.
Keeping the Candy Stash Safe
- Store candy in sealed containers on high shelves or in closed cabinets
- Remind children not to leave candy bags on the floor or in bedrooms
- Check coat pockets and backpacks after trick-or-treating
- Keep a few pet-safe treats handy so your pet can join in
Common Questions About Pets and Halloween Candy
How much chocolate is dangerous for a dog?
It depends on the type of chocolate and your dog’s size. Because it is hard to judge at home, call a veterinarian or poison control with the details.
My dog ate candy but seems fine. Do I still need to call?
Yes. Signs of xylitol, chocolate, and raisin poisoning can take hours to appear, and early treatment works best.
Is candy dangerous for cats?
Cats are less likely to eat candy, but chocolate is still toxic to them, and they may play with and swallow wrappers or ribbon.
When to Schedule a Visit with a Veterinarian
If your pet got into Halloween candy, call us right away at 781-646-0758. Arlington Animal Clinic is located at 191 Broadway in Arlington, MA, and is open Monday through Friday from 8:00 AM to 6:00 PM. After hours, contact your nearest 24-hour emergency animal hospital. For routine questions about pet safety, we are always happy to help during your pet’s next wellness visit.
