Can my dog eat marshmallow?
No.
Sugar, and sugar-free ones are far worse: xylitol can kill a dog in tiny amounts. One plain marshmallow isn't an emergency.
Already ate it?
If they ate itOne plain marshmallow: nothing to do. If it was sugar-free or the label lists xylitol, go to a vet now.
Watch forIf xylitol: weakness, wobbliness or collapse, sometimes within 30 minutes. Otherwise vomiting or diarrhoea within a day.
Thinking of giving it?
WhyAlways check for xylitol on anything sugar-free before you panic or relax.
Where this comes from. Merck Veterinary Manual — Xylitol Toxicosis in Dogs; Pet Poison Helpline — My Dog Ate Candy.
Reviewed: 20 October 2026
A guide, not a diagnosis. If your dog seems unwell, call your vet.
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