What makes it harmful
xylitol (a sugar alcohol used as a sweetener)
How much is dangerous
By Merck Veterinary Manual / Pet Poison Helpline: a dangerous drop in blood sugar starts at >100 mg/kg (~45 mg/lb); liver failure at >500 mg/kg (~227 mg/lb). A single piece of sugar-free gum may hold enough xylitol to harm a small dog — always check the package.
Symptoms to watch for
Mild / early
- • Vomiting
- • Weakness
- • Lethargy (low blood sugar)
Severe — vet urgently
- • Collapse
- • Seizures
- • Acute liver failure
- • Death
What to do if eaten
This is an emergency — get to a vet immediately if any is eaten, even a small amount. Do not wait for symptoms. Take the product packaging so the xylitol amount can be checked.
Frequently asked questions
- Can dogs eat xylitol?
- Highly toxic — even a small amount can be fatal. By Merck Veterinary Manual / Pet Poison Helpline: a dangerous drop in blood sugar starts at >100 mg/kg (~45 mg/lb); liver failure at >500 mg/kg (~227 mg/lb). A single piece of sugar-free gum may hold enough xylitol to harm a small dog — always check the package.
- What happens if a dog eats xylitol?
- Symptoms can include vomiting, weakness, lethargy (low blood sugar), collapse, seizures, and more. Severity depends on the amount and your dog’s size.
- What should I do if my dog ate xylitol?
- This is an emergency — get to a vet immediately if any is eaten, even a small amount. Do not wait for symptoms. Take the product packaging so the xylitol amount can be checked.
Sources: Pet Poison Helpline · Merck Veterinary Manual · Project book library (cross-checked).
⚠️ For general guidance, not veterinary advice. Toxicity depends on your dog’s size, the amount eaten, and individual sensitivity. Always confirm with your vet for health decisions.