Cats
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
cat safety reference
Is Water Hemlock safe for cats?
Cicuta species
Cowbane is a highly poisonous genus of plants in the carrot family, known for containing potent neurotoxins that affect the central nervous system. It is considered one of the most lethal plants in North America and should be strictly avoided in any environment accessible to pets.
CicutaCicuta speciesPoison ParsnipWater Hemlock
- Light
- Full sun to partial shade
- Habit
- Herbaceous perennial
- Care
- High (due to extreme toxicity)
Safety status
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.
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.
Sources: ASPCA (no first-aid guidance).
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Cats — concern notes
Common signs
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.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
Questions about Water Hemlock
Is Water Hemlock toxic to cats?
Yes, Water Hemlock (Cicuta species) is extremely toxic to cats. It contains potent neurotoxins and is considered one of the most lethal plants in North America — even small amounts can be fatal.
What are the symptoms of Water Hemlock poisoning in cats?
Signs include excessive salivation, muscle tremors, seizures, rapid heart rate, and respiratory distress. Early warning signs can be drooling and weakness, but progression to severe neurological symptoms like seizures can happen very rapidly.
What should I do if my cat ate Water Hemlock?
Treat it as an immediate emergency — do not wait for symptoms to appear. Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 right away. Severe signs can develop quickly and this plant can be fatal even in small quantities.
How quickly does Water Hemlock affect cats?
Onset can be very rapid, though the ASPCA listing does not specify an exact dose-to-onset timeline for cats. Because of the extreme severity and speed of potential progression — including seizures, respiratory depression, and death — any suspected ingestion must be treated as an immediate emergency without waiting to see if symptoms develop.
Same cat verdict
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