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Halloween Pet Safety 2026: Chocolate, Lollies, Costumes and Black Cats

Posted by ADS Pet Store

Oct 08 2026

Updated October 2026. Halloween falls on Saturday 31 October 2026. The biggest risks for pets are chocolate and sugar-free lollies containing xylitol, followed by wrappers, glow sticks, costumes and the stress of constant door-knocking. If your pet eats something it shouldn't, contact your vet or the Animal Poisons Helpline on 1300 869 738 straight away.

Key takeaways

Chocolate contains theobromine, which is toxic to dogs and cats. Dark chocolate, cooking chocolate and cocoa powder are the most dangerous.
Xylitol, a sweetener in some sugar-free lollies and gum, can cause dangerously low blood sugar in dogs and a risk of delayed liver injury.
Keep lolly bowls, wrappers and glow sticks out of reach, and give pets a quiet room during trick-or-treat hours.
Keep cats indoors on Halloween night, and that includes black cats celebrated on National Black Cat Day, 27 October.
Have your vet's number, your nearest emergency vet and the Animal Poisons Helpline (1300 869 738) saved before the night.

Why is chocolate dangerous for dogs and cats?

Chocolate contains theobromine, which comes from cocoa. According to the RSPCA, cocoa powder, cooking chocolate and dark chocolate contain more theobromine than milk chocolate. How sick a pet becomes depends on its size, how much it ate and the type of chocolate. Signs can include restlessness, hyperactivity, trembling, vomiting, diarrhoea, increased thirst and urination, a racing heart, muscle tremors and seizures, and severe cases can be fatal. Dogs are the usual culprits because they'll happily eat a whole bag of mini bars, wrappers and all.

Are sugar-free lollies safe for pets?

No, check the label. The Animal Poisons Centre says xylitol is used in some sugar-free lollies, chewing gum, toothpaste, medications and some foods. In dogs it triggers insulin release, which can cause dangerously low blood sugar, and it carries a risk of delayed liver injury. Early signs include vomiting, lethargy and loss of coordination. Keep handbags and coat pockets with gum or mints out of reach too.

What other Halloween hazards should I watch for?

Hazard	Why it's a risk	What to do
Lolly wrappers and sticks	Foil, plastic and lollipop sticks can upset the stomach or cause a blockage	Use a lidded bin and check the floor after trick-or-treating
Glow sticks and glow jewellery	The liquid causes drooling, retching and vomiting, can hurt the eyes, and swallowed plastic can cause a blockage	Keep them away from pets and never use them as collars
Costumes	Can restrict movement, hearing or breathing, or be chewed and swallowed	Try a themed bandana instead, and never leave a costumed pet alone
Candles and decorations	Burns, fire risk, and chewed cords or small parts	Use battery tea lights and keep decorations out of reach
Door-knocking	Noise, strangers and an open door can stress pets or lead to escapes	Set up a quiet room, and check microchip and ID tag details

Cats in particular often bite into glow sticks. Pet Poison Helpline (a US service) describes rapid-onset drooling, retching and vomiting after a pet tastes the liquid. Liquid in the eyes can cause redness, pain and possible eye damage, and swallowed plastic can cause an intestinal blockage. Call your vet if your pet has chewed a glow stick.

How do I keep an anxious pet calm on trick-or-treat night?

RSPCA NSW suggests setting your pet up in an area of the house where it feels safe, away from the front door, with bedding, toys and a chew or feeding enrichment. This reduces its exposure to visitors and the chance of an escape while the door keeps opening. A few other ideas:

Walk your dog and feed dinner before trick-or-treaters arrive.
Set up the quiet room with bedding, water and a long-lasting chew or puzzle toy.
Play background music or the TV to soften the sound of knocks and doorbells.
Consider leaving a lolly bowl outside with a sign, so you're not opening the door every few minutes.
Watch for signs of stress. RSPCA WA lists pacing, whining, barking and hiding. If your pet struggles every year, talk to your vet before next Halloween.
Check that microchip details and ID tags are up to date in case your pet slips out.

Should pets wear Halloween costumes?

Only if they're genuinely comfortable. RSPCA WA advises taking a costume off straight away if a pet looks uncomfortable, tries to wriggle free or starts chewing it. Costumes should fit well and not restrict movement, hearing or breathing, or pose a choking risk. Never leave a pet unsupervised in costume. A simple themed collar or bandana is often the kinder choice.

Why keep black cats indoors around Halloween?

National Black Cat Day is on 27 October. Cats Protection, the UK charity that started it in 2011, found that black cats in its care took about a week longer on average to find a home than cats of other colours. It's a good time to celebrate black cats and consider adopting one. On Halloween night, keep all cats indoors, whatever their colour. Noise, costumes, strangers and open doors make it an easy night for a cat to get spooked or lost. Many Melbourne councils, including Kingston, already require cats to be confined to their property overnight.

What should I do if my pet eats chocolate or lollies?

Move your pet away and remove any remaining treats or wrappers.
Work out what was eaten, roughly how much and when. Keep the packaging.
Call your vet, your nearest emergency vet or the Animal Poisons Helpline on 1300 869 738 straight away, even if your pet seems fine.
Don't try to make your pet vomit unless a vet tells you to.

What are safe Halloween treats for pets?

Skip the human lollies and stock up on treats made for pets. Browse our dog treats and cat treats, including single-protein and freeze-dried options. Treats should make up only a small part of the daily diet, so reduce dinner slightly if you're handing out extras. Check the product page for current pricing.

Frequently asked questions

How much chocolate is toxic to a dog?

It depends on the dog's size, the amount eaten and the type of chocolate. Dark chocolate, cooking chocolate and cocoa powder are the most dangerous. Treat any amount as a risk and call your vet.

What is the Animal Poisons Helpline number in Australia?

The Animal Poisons Helpline number in Australia is 1300 869 738. You can also contact your vet or nearest emergency vet straight away.

Is xylitol dangerous for dogs?

Yes. Xylitol can cause dangerously low blood sugar in dogs and carries a risk of delayed liver injury. Early signs include vomiting, lethargy and loss of coordination.

When is National Black Cat Day?

National Black Cat Day is on 27 October each year. It was started in 2011 by the UK charity Cats Protection to encourage people to adopt black cats.

Is it OK to dress my dog up for Halloween?

Only if your dog is comfortable. Remove the costume if your dog wriggles, chews or seems stressed, make sure it doesn't restrict movement or breathing, and never leave your dog alone in costume.