Kyo's Kitchen
ENFIES

Can Dogs Eat Marshmallows?

AVOID

AVOID — Ordinary marshmallows are mostly sugar and are not recommended; sugar-free versions may contain toxic xylitol.

Regular sugar-based marshmallows have no place in a dog's diet. Not all marshmallows contain xylitol, but sugar-free ones might, and xylitol is toxic to dogs.

If your dog ate one or two ordinary sugar-based marshmallows, watch for stomach upset. If the marshmallows were sugar-free, or the label lists xylitol, contact a veterinarian, or an emergency veterinary clinic out of hours, straight away, even if your dog seems well. Contact your veterinarian if your dog ate a large amount.

On this page
A few plain white marshmallows on a small cream-coloured plate.

Quick answer

Category
Other
Recommended preparation
not recommended
Main concern
sugar and calories; xylitol in some sugar-free products
Suitable as everyday food
no

The full answer

This page covers ordinary marshmallows made with sugar. They are high in sugar and calories and offer nothing useful to a dog.

PetMD says one plain mini marshmallow once in a while is probably OK, while AKC is more cautious. We recommend not sharing them.

Not all marshmallows contain xylitol. However, sugar-free or reduced-sugar marshmallows can, and xylitol is toxic to dogs. Always check the label.

Risks and Things to Know

  • Sugar and calories: stomach upset, and weight gain if given often.
  • Xylitol in some sugar-free products can cause a dangerous drop in blood sugar, seizures and liver failure.
  • Chocolate-coated marshmallows add the risks of chocolate.
  • Eating a whole bag can cause significant stomach upset.

How Much Can Dogs Eat?

Not recommended as a treat.

How Should I Prepare It?

  • Not recommended in any form.
  • Check the label of any sugar-free product for xylitol.

What If My Dog Ate Too Much?

If the marshmallows were sugar-free or the label lists xylitol, contact a veterinarian, or an emergency veterinary clinic out of hours, straight away, even if your dog seems fine. If your dog ate many ordinary marshmallows, contact your veterinarian.

This guide is for general educational purposes and isn't a substitute for advice from your veterinarian. If your dog has eaten something potentially toxic or is showing concerning symptoms, contact a veterinarian promptly.

Frequently Asked Questions

Ordinary sugar-based marshmallows are not toxic, but they are mostly sugar and are not recommended. Sugar-free versions may contain xylitol, which is toxic.

No. Most ordinary marshmallows are made with sugar. Some sugar-free products may contain xylitol, so check the label.

If it was an ordinary marshmallow, watch for stomach upset. If it was sugar-free or contains xylitol, contact a veterinarian straight away.

PetMD says one plain mini marshmallow once in a while is probably OK, but we still recommend not offering them.

No. Chocolate is toxic to dogs and has its own page.

They are high in sugar and calories, with no nutritional benefit for dogs.

How this guide was written

Last updated 2 October 2026. We write from widely published, mainstream pet-health sources and avoid presenting feeding amounts as veterinary prescriptions.

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