Halloween pet safety: how to keep dogs and cats safe on trick-or-treat night

Updated October 13, 2026 · LostPet.com

Short answer

To keep pets safe on Halloween, put them in a quiet room away from the front door during trick-or-treating, keep candy (especially chocolate and sugar-free candy with xylitol) and raisins out of reach, skip costumes your pet doesn't enjoy, and make sure they wear an ID tag and have a registered microchip in case they slip out.

Halloween is fun for people, but for many pets it's a stressful night. The doorbell keeps ringing, strangers in masks shout "trick or treat," and the front door opens again and again. The AVMA notes that all that coming and going can stress pets and give them chances to escape (AVMA).

The good news: a little planning keeps most of the risks away. Here's what to do before the night, on the night, and if something goes wrong.

Before Halloween: a 10-minute ID check

If your pet does slip out, ID is what gets them home. The AVMA recommends a microchip, a collar and an ID tag, so anyone who finds your pet can reach you (AVMA). Do this a few days ahead:

Check the collar and tag. Is the phone number on the tag still yours? Can you read it? Our pet ID tag guide covers what to engrave.
Check the microchip registration. A chip only helps if the registry has your current number. Here's how to check your pet's microchip in a few minutes.
Take a clear, recent photo in good light, from the side and the front.
Register your pet free on LostPet.com. Add the photo, breed, color, ZIP code, microchip number and your phone, so the details are saved before you ever need them.

On trick-or-treat night: your checklist

Give your pet a quiet room away from the front door. Close the door, add their bed, water and a favorite toy. The AVMA recommends this for pets that are wary of strangers or may bite (AVMA).
Keep pets indoors. That includes cats who usually go out.
Walk your dog early, before trick-or-treaters arrive, and use a leash.
Watch the door. Before you open it, check where your pet is. A baby gate or a leash helps. Some families hand out candy from the porch so the door stays closed.
Tell guests and kids to keep the door shut and not let pets out.
Keep the ID tag on all evening, even indoors.

Keep candy and treats out of reach

Candy is for trick-or-treaters, not pets. The AVMA says not to feed pets Halloween treats (AVMA):

Chocolate in all forms can be very dangerous for dogs and cats, especially dark or baking chocolate (ASPCA).
Xylitol, a sugar substitute in sugar-free candy and gum, can be life-threatening for dogs (ASPCA).
Raisins can cause kidney failure in pets (AVMA).
Wrappers and lollipop sticks can cause choking or stomach and gut problems (ASPCA Pet Health Insurance).

Put candy bowls on high counters or in a closed cabinet. Remind kids that a dog's nose will find candy hidden in a bedroom.

If your pet eats candy, contact your veterinarian or an emergency vet right away (ASPCA). You can also call ASPCA Animal Poison Control at (888) 426-4435, open 24/7; a fee may apply (ASPCA). Need a clinic nearby? Use our vet directory.

Costumes: only if your pet enjoys it

Some pets don't mind a costume. Many would rather skip it. The ASPCA suggests a costume only if you know your pet likes it (ASPCA). If you do dress them up, the AVMA says the costume should (AVMA):

fit well and be comfortable,
have no pieces that can be chewed off or cause choking,
not block your pet's sight, hearing, breathing, mouth or movement.

Let your pet try it on before the night. If they seem upset, a festive bandana works just as well. Never leave a pet in costume alone.

Decorations, candles and glow sticks

Candles and jack-o'-lanterns: keep them out of reach (AVMA). A wagging tail or a curious cat can knock them over.
Glow sticks: the liquid tastes very bad and can make pets drool or act strangely, though it isn't likely to be harmful (AVMA).
Costume pieces, batteries and small decorations can cause choking, internal injury or illness, so keep them picked up.

If your pet gets out

Act right away. Search nearby first, then call local shelters and vets. Follow our step-by-step guide, what to do if your dog is lost, and report your pet lost on LostPet.com. Use our shelter directory and vet directory to find who to call near you.

If your pet is already registered, your photo and details are saved, and My Pets can print a lost-pet flyer with a QR code on the spot.

Make it a habit, not a one-night fix

The same steps help on every busy or noisy day, from parties to fireworks. See our guide to fireworks and pets before New Year's Eve.

Frequently asked questions

Is Halloween candy dangerous for dogs and cats?

Yes, some of it is. The AVMA warns that candy can contain chocolate or xylitol, a sugar substitute in sugar-free candy and gum, and that raisins can cause kidney failure in pets. You often can't tell what a candy contains by looking at it, so keep all of it out of reach.

What should I do if my dog ate Halloween candy?

Call your veterinarian or an emergency vet right away, especially if the candy had chocolate or was sugar-free. You can also call ASPCA Animal Poison Control at (888) 426-4435, which is open 24/7 (a consultation fee may apply). Have the wrapper handy so you can say what and how much your pet ate.

Should I put my pet in a Halloween costume?

Only if you know your pet enjoys it. The costume should fit well, have no pieces that can be chewed off, and not block sight, hearing, breathing, the mouth or movement. Let your pet try it on before the night, and never leave a pet in costume alone. A festive bandana is a good alternative.

How do I stop my dog from running out the door on Halloween?

Keep your dog in a closed room or behind a gate away from the front door during trick-or-treating hours, or hand out candy outside so the door stays shut. Make sure your dog wears a collar with a current ID tag and has a registered microchip, and save a free record with photos at LostPet.com.

Are glow sticks poisonous to pets?

The AVMA says the liquid in glow sticks tastes very bad and can make pets drool or act strangely, but it isn't likely to be harmful. Keep glow sticks, batteries and costume pieces away from pets anyway, because other parts can cause choking or internal injury. Call your vet if you're worried.

More LostPet.com guides

Sources

This guide is general information, not veterinary advice. If your pet is hurt or unwell, contact your veterinarian.