Halloween can be a magical, fun time—but it’s also a night full of hidden dangers for pets. With candy, costumes, decorations, and trick-or-treat traffic all happening at once, our furry family members can quickly wind up in a scary situation.

At Boundary Bay Veterinary Specialty Hospital, we see a rise in Halloween-related emergencies every year. With a little preparation, you can keep the spooky season safe and stress-free for your pets.

Treats aren’t always a treat

It’s easy to assume a piece of candy is harmless, but Halloween sweets can be downright toxic for pets.

• Chocolate—especially dark or baking chocolate—contains theobromine and caffeine and can cause vomiting, rapid heart rate, seizures, or worse.
• Xylitol (in sugar-free gum, candy, and some peanut butters) can cause dangerous hypoglycemia, liver failure, or seizures even in small amounts.
• Raisins and grapes may trigger acute kidney failure in dogs.
• Candy wrappers, sticks, and foil are choking hazards and can cause intestinal blockages.

Tip: Store candy in secure containers and keep it well out of reach. Offer your pet a festive, pet-safe treat instead.

Costume caution for Pets at Halloween

Dressing pets up can be adorable—but not all costumes are safe or comfortable.

• Ensure costumes don’t restrict breathing, vision, or movement.
• Avoid small pieces, elastic bands, or embellishments that could be chewed off and swallowed.
• Watch for stress signs such as pacing, ears back, or escape attempts—if your pet seems uncomfortable, skip the costume.

Tip: A simple Halloween bandana or themed collar can be a safer, stress-free alternative.

Decorations & Seasonal Hazards that are Safe for Pets

Halloween décor helps set the mood—but many items can put pets at risk.

• Glow sticks can leak a bitter liquid that causes drooling and stomach upset.
• Fake spider webs or garlands may cause choking or intestinal obstruction if swallowed.
• Candles in jack-o-lanterns pose fire and burn risks.
• Loose cords or batteries can cause electrical burns or internal injury if chewed.

Tip: Use flameless candles, place decorations out of reach, and secure electrical cords.

Trick-or-treat Chaos Can Cause Stress for Pets

From constant doorbell rings to kids in costumes, Halloween night can be overwhelming for pets.

• Excited or anxious pets may bolt when the door opens.
• Loud noises, strange smells, and masked faces can trigger fear or stress.

Tip: Set up a quiet, secure space away from the front door with water, cozy bedding, and familiar toys. Ensure ID tags and microchip info are up to date.

What to do if Things Go Wrong and Your Pet has an Emergency

• Don’t wait for symptoms to worsen—quick action can save lives.
• Call your veterinarian or go to a veterinary emergency hospital immediately.
• Bring any relevant packaging, wrappers, or costume pieces to help the team identify the problem.

Emergency care at Boundary Bay

If you’re ever unsure about your pet’s condition, err on the side of caution. Boundary Bay Veterinary Specialty Hospital is open 24/7—emergency walk-ins welcome. We are VECCS Level 1 certified and equipped to handle critical emergencies and trauma, with specialists on staff and on call.