Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Water Hemlock - what should I do?
Cicuta species
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Excessive salivation, muscle tremors, seizures, rapid heart rate, and respiratory distress.
Escalation note
Extremely severe; ingestion of even small amounts can be fatal. Seek immediate emergency veterinary care if ingestion is suspected.
What to watch for
ASPCA lists diarrhea, seizures, tremors, extreme stomach pain, dilated pupils, fever, bloat, respiratory depression, and death. Drooling and weakness can be the earliest signs.
Time window
Onset can be very rapid; exact dose-to-onset is not in the ASPCA listing for cats.
When to call the vet
Treat any suspected ingestion as an immediate emergency. Call your vet or ASPCA Animal Poison Control (888-426-4435) at once — do not wait for symptoms. Severe signs can come on quickly.
What this means for your cat
Cats — extremely toxic. ASPCA lists water hemlock (Cicuta) as toxic to cats; the toxin cicutoxin acts directly on the central nervous system, and ingestion of even small amounts can be rapidly fatal. Outdoor cats wandering near marshy ditches, streams, or wet pasture are the rare but very high-risk case.
Sources: ASPCA (no first-aid guidance).
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.