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ToxicEmergency

Is poison hemlock toxic to dogs?

Highly toxic. Poison hemlock quickly affects the nerves, causing tremors, drooling and paralysis, and can kill.

If your dog ate or touched this, call your vet or a pet poison line now

United States

ASPCA Poison Control+1 (888) 426-443524/7, 365 days a year · A consultation fee may apply · Run by the ASPCA for pet owners and vets.
Pet Poison Helpline+1 (855) 764-766124/7 · A fee applies; their website has the current price · Serves the US, Canada and the Caribbean.

Poison lines in other countries: United Kingdom, Australia, Canada, New Zealand

United Kingdom

Animal PoisonLine+44 1202 50900024 hours a day · A fee applies; their website has the current price · Run by the Veterinary Poisons Information Service for pet owners; for collapse, fits or breathing trouble, call your vet.

Australia

Animal Poisons Helpline1300 869 73824/7 · From A$75 per consultation; their website has the current price · Staffed by poisons information consultants with emergency vet or pharmacy backgrounds.

Canada

Pet Poison Helpline+1 (855) 764-766124/7 · A fee applies; their website has the current price · Serves the US, Canada and the Caribbean.

New Zealand

NZ Animal Poisons Helpline0800 869 73824/7 · Charges apply · The NZ National Poisons Centre does not advise on animals and refers pet owners here.

Find an emergency vet

What to do now

Call your vet or a pet poison line now.
Bring a piece of the plant in a bag, or a photo, to help identify it.
Go to a vet right away, even if your dog seems fine.

Don't

Don't make your dog vomit unless a vet tells you to.
Don't give milk, oil, salt or other home remedies unless a vet tells you to.

Signs to watch for

Agitation
Drooling
Diarrhea
Tremors
Weakness or paralysis

When signs appear: Rapid

Why

Poison hemlock contains several alkaloids that act fast on the nervous system.

Sources

Guide reviewed 9 October 2026.

General information from the sources above, not a diagnosis. When in doubt, call your vet.