Is Water Hemlock Toxic to Cats?
Yes — Water Hemlock is severely toxic to cats
Water Hemlock is widely regarded as the most violently toxic plant in North America. A single bite of the root can kill a large dog within hours.
Symptoms in Cats
If your cat eats Water Hemlock, watch for these symptoms (onset: 15 to 90 minutes):
- Violent seizures
- Excessive salivation
- Tremors
- Respiratory failure
- Sudden death
What To Do
Veterinary emergency. Considered the most toxic plant in North America. Seizures can begin within minutes.
This is a veterinary emergency for cats. Call your vet or ASPCA Poison Control (888) 426-4435 immediately.
Quick Facts
Cicuta maculata
Yes (severe)
Cicutoxin
all parts, roots, stems
Sources: ASPCA Animal Poison Control Center, Pet Poison Helpline. View full Water Hemlock toxicity profile.