Sweets · updated 2026-09-12
Can dogs eat xylitol (birch sugar)?
No. Xylitol is deadly to dogs — even in small amounts.
Why
Xylitol, also labelled 'birch sugar', triggers a massive insulin release in dogs, causing dangerous low blood sugar within an hour, and can cause liver failure. It hides in sugar-free gum, mints, some peanut butters, 'skinny' syrups, toothpaste, baked goods and medicines.
What to do instead
Never. Read every sugar-free label. Keep handbags with gum away from dogs.
Symptoms to watch for
Vomiting, weakness, staggering, collapse, seizures, often within 30–60 minutes. Emergency — go straight to the vet.
If your dog has eaten xylitol (birch sugar), don't wait for symptoms.
Call your vet, or in the US the ASPCA Animal Poison Control Center (888-426-4435) or Pet Poison Helpline (855-764-7661), 24 hours a day. Have the amount, the time and any packaging ready.
And for cats?
Toxic. Avoid completely. Can cats eat xylitol (birch sugar)? →
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This guide is general information for healthy adult dogs, based on published veterinary guidance (ASPCA, Pet Poison Helpline, AKC, VCA). It is not a substitute for advice from your own vet, who knows your dog's weight, age and medical history. If you are unsure, ask them before sharing any human food.