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Is The King Ostrich Fern toxic to cats?

Matteuccia struthiopteris 'The King'

Mildly toxic to cats

Mildly. The ASPCA lists the king ostrich fern as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. This classification follows the ASPCA Toxic and Non-Toxic Plant List. The edible fiddleheads (young croziers) of Matteuccia struthiopteris are safe to eat only when thoroughly cooked — raw or undercooked fiddleheads contain an unidentified heat-labile toxin that can cause food poisoning (nausea, vomiting, diarrhoea). Health Canada and the US FDA advise boiling or steaming for at least 10–15 minutes before consumption. Not individually listed by ASPCA for pet toxicity, but due to the documented human toxicity of raw fronds, the plant should be kept out of reach of pets and small children.

What to do if your cat ate the king ostrich fern

  1. Remove any plant material from your cat's mouth and move the king ostrich fern out of reach.
  2. Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
  3. Do not induce vomiting unless a vet or poison-control specialist instructs you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
  5. Bring a leaf or photo of the king ostrich fern to the appointment so it can be treated correctly.

General guidance, not veterinary advice. If you think your cat has eaten the king ostrich fern, contact your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.

Is the king ostrich fern toxic to cats? — FAQ

Is the king ostrich fern toxic to cats?

Mildly. The ASPCA lists the king ostrich fern as mildly toxic to cats — a chewing cat typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. The edible fiddleheads (young croziers) of Matteuccia struthiopteris are safe to eat only when thoroughly cooked — raw or undercooked fiddleheads contain an unidentified heat-labile toxin that can cause food poisoning (nausea, vomiting, diarrhoea). Health Canada and the US FDA advise boiling or steaming for at least 10–15 minutes before consumption. Not individually listed by ASPCA for pet toxicity, but due to the documented human toxicity of raw fronds, the plant should be kept out of reach of pets and small children.

What are the symptoms if a cat eats the king ostrich fern?

The edible fiddleheads (young croziers) of Matteuccia struthiopteris are safe to eat only when thoroughly cooked — raw or undercooked fiddleheads contain an unidentified heat-labile toxin that can cause food poisoning (nausea, vomiting, diarrhoea). Health Canada and the US FDA advise boiling or steaming for at least 10–15 minutes before consumption. Not individually listed by ASPCA for pet toxicity, but due to the documented human toxicity of raw fronds, the plant should be kept out of reach of pets and small children. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your cat has had access to the king ostrich fern.

What should I do if my cat ate the king ostrich fern?

Stay calm. Remove any plant from your cat's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice; a leaf or photo helps the vet treat it correctly.

Is the king ostrich fern toxic to dogs too?

The ASPCA classification Growli uses applies to both cats and dogs: The King Ostrich Fern is mildly toxic to dogs as well. See the full the king ostrich fern pet-safety guide for both species.

What is a cat-safe alternative to the king ostrich fern?

For a similar look without the risk, see the best cats-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.

Full the king ostrich fern pet-safety