Can dogs eat xylitol?
If your dog has just eaten xylitol
Do this now
- This is a medical emergency — call your vet immediately, even if only a small amount was eaten and your dog seems fine
- If your vet is closed, call the Animal PoisonLine on 01202 509000 or the nearest 24/7 emergency vet
- Bring the packaging with you — the vet needs to know exact xylitol content
- Do NOT induce vomiting yourself unless instructed — hypoglycaemia can crash fast and vomiting makes it worse
- Do not give sugar or honey at home unless your vet specifically tells you to
- Get to a vet within 30 minutes if at all possible
What your vet will want to know
Have this information ready when you call:
- Exact product name and brand
- Whether xylitol is confirmed in the ingredients (or 'birch sugar')
- Amount eaten (count pieces of gum, weigh peanut butter, etc.)
- Xylitol content if listed on packaging
- Time of ingestion
- Your dog's weight
- Any symptoms already appearing
The full picture
Xylitol is an artificial sweetener that's among the most dangerous substances a dog can ingest. In humans it has no effect on insulin; in dogs, it triggers a massive insulin release, causing blood sugar to crash within 15–60 minutes of ingestion (hypoglycaemia). Higher doses damage the liver. It's now in far more UK products than most owners realise: sugar-free chewing gum, many 'low-sugar' peanut butters, mints, some baked goods, sugar-free sweets, some medicines, toothpaste, mouthwash, and increasingly in 'healthy' snack bars and low-sugar yoghurts. Xylitol is sometimes listed as 'birch sugar' on ingredient labels — a name dog owners should memorise. As little as 0.1 g per kg of body weight causes hypoglycaemia; 0.5 g per kg can cause liver failure. A single piece of xylitol-sweetened gum can contain 0.3–1 g of xylitol — potentially lethal to a small dog.
Risks to watch for
- Rapid, severe hypoglycaemia (low blood sugar) within 15–60 minutes
- Vomiting (often the first sign)
- Weakness, staggering, collapse
- Seizures
- Liver failure at higher doses (may appear 12–72 hours after ingestion)
- Death if untreated
Symptom timeline
Symptoms typically progress in stages. Knowing what to expect helps you act fast:
- 15–60 minutes Vomiting, often the first visible sign
- 30 minutes – 2 hours Hypoglycaemia — weakness, wobbling, collapse, seizures
- 12–72 hours Liver damage at higher doses — jaundice, ongoing vomiting, lethargy
Breed-specific warnings
- Small breeds reach toxic doses on very small amounts — a single stick of sugar-free gum can cause hypoglycaemia in a 5 kg dog.
- Flat-faced breeds: never induce vomiting at home.
Safe portion size
None — zero. There is no safe amount.
Safer alternatives
- Dog-safe peanut butter (xylitol-free, check label)
- Blueberries
- Plain cooked chicken pieces for training
Common questions
My peanut butter says 'no added sugar' — is it safe?
Not automatically. 'No added sugar' peanut butters sometimes use xylitol as a sweetener. Always check the ingredients. The safest peanut butters list only 'peanuts' or 'peanuts and salt'.
My dog licked my toothpaste — is that a problem?
A single lick probably isn't enough to cause serious harm in most dogs, but xylitol content varies between brands. Check the tube. If in doubt, call your vet, especially for smaller dogs.
What's 'birch sugar'? Is it the same thing?
Yes. 'Birch sugar' is a marketing-friendly name for xylitol. Products often use this name on front-of-pack claims while still listing xylitol in the full ingredients. Treat them as the same thing.
How much xylitol is dangerous?
Roughly 0.1 g per kg of body weight causes hypoglycaemia, and 0.5 g per kg can cause liver failure. For context, a single piece of sugar-free gum can contain 0.3–1 g of xylitol. Small dogs are at risk from very small amounts.
My dog seems fine hours after eating xylitol — are they OK?
Possibly, but liver damage can appear 12–72 hours later even if the initial hypoglycaemia was mild or avoided. If there's any chance they ate a meaningful amount, your vet may recommend monitoring bloodwork.
Is stevia or aspartame also dangerous?
No. Stevia, aspartame, sucralose, erythritol, and monk fruit are not toxic to dogs the way xylitol is. Xylitol is uniquely dangerous. That said, sugar-free products can still cause digestive upset and aren't 'dog treats.'
Unexpected vet bills can run into thousands
One emergency visit for food poisoning can cost £500–£5,000+. Compare UK pet insurance in 60 seconds.
Compare pet insurance →Checked against UK veterinary guidance — see our editorial standards and source list. If your dog has eaten something and you need urgent advice, call a vet or the Animal PoisonLine on 01202 509000.