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If your cat ate muster-john-henry — do this now

  1. Take the plant away and clear any pieces from their mouth.
  2. Do not induce vomiting unless told to by a professional.
  3. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 now.

Muster-John-Henry is mildly toxic to cats (ASPCA).

Pet emergency

My cat ate Muster-John-Henry — what to do

Step by step

  1. Take muster-john-henry away and remove any plant material from your cat's mouth so they cannot eat more.
  2. Note roughly how much was eaten and when — this helps the vet judge the risk.
  3. Do NOT induce vomiting unless a vet or poison-control specialist tells you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice.
  5. Watch for drooling, pawing at the mouth, vomiting, loss of appetite, or lethargy, and bring a leaf or photo to the appointment.

This is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide as well as the plant. When in doubt, call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435.

My cat ate muster-john-henry — FAQ

Is muster-john-henry poisonous to cats?

Yes — the ASPCA lists Muster-John-Henry (Tagetes minuta) as mildly toxic to cats. Tagetes species are listed by the ASPCA as mildly toxic to dogs and cats due to thiophene compounds in the foliage and sap. T. minuta contains high concentrations of essential oils (including dihydrotagetone and ocimenone) that may cause gastrointestinal upset or contact dermatitis in pets and sensitive humans. The plant is not individually listed by ASPCA but falls under the Tagetes genus advisory.

How serious is it if my cat ate muster-john-henry?

Muster-John-Henry is mildly toxic, so most cats get short-lived mouth irritation, drooling, and vomiting rather than a life-threatening reaction. It is still worth a vet call to be safe, especially if your cat ate a lot or symptoms persist.

What symptoms should I watch for?

Signs usually appear soon after chewing: drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy. Tagetes species are listed by the ASPCA as mildly toxic to dogs and cats due to thiophene compounds in the foliage and sap. T. minuta contains high concentrations of essential oils (including dihydrotagetone and ocimenone) that may cause gastrointestinal upset or contact dermatitis in pets and sensitive humans. The plant is not individually listed by ASPCA but falls under the Tagetes genus advisory. Any worsening or persistent symptoms warrant an immediate vet visit.

Should I make my cat vomit?

No — do not induce vomiting unless a vet or the ASPCA Animal Poison Control Center specifically tells you to. The wrong action can make things worse. Call (888) 426-4435 and follow professional advice.

How do I stop this happening again?

Keep muster-john-henry well out of reach, or swap it for an ASPCA non-toxic plant — see the best cats-safe plants list.

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