Last reviewed: 2026-09-05 · Reference ranges: ASPCA, Pet Poison Helpline & Merck Veterinary Manual
One marshmallow is unlikely to harm a small dog but watch for choking or stomach upset. The main risks are sugar overload and the sticky shape blocking the throat. If your dog starts drooling, retching, or acting lethargic, call your vet. For tiny breeds, even one marshmallow can sometimes cause diarrhea. Offer water and skip the next meal if their belly seems off.
Feed with care · Dogs · full breakdown on the linked food page
Sugar and gelatin, and a choking shape. Sugar-free marshmallows contain xylitol.
The full verdict, portion guidance and serving notes are collected on the Marshmallow food facts page.