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Pet safety

Is Male Fern toxic to dogs?

Dryopteris filix-mas

Mildly toxic to dogs

Mildly. The ASPCA lists male fern as mildly toxic to dogs — a chewing dog 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. Dryopteris filix-mas is not on the ASPCA non-toxic list. Its rhizome contains filicic acid (filixic acid / filicin) and thiaminase; ingestion has caused poisoning in cattle (GI distress and transient blindness), and the rhizome was historically used as a deworming drug. Not individually evaluated by the ASPCA for cats and dogs; treat as toxic, prevent chewing, and consult a vet if ingestion occurs.

What to do if your dog ate male fern

  1. Remove any plant material from your dog's mouth and move male 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 male fern to the appointment so it can be treated correctly.

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

Is male fern toxic to dogs? — FAQ

Is male fern toxic to dogs?

Mildly. The ASPCA lists male fern as mildly toxic to dogs — a chewing dog typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. Dryopteris filix-mas is not on the ASPCA non-toxic list. Its rhizome contains filicic acid (filixic acid / filicin) and thiaminase; ingestion has caused poisoning in cattle (GI distress and transient blindness), and the rhizome was historically used as a deworming drug. Not individually evaluated by the ASPCA for cats and dogs; treat as toxic, prevent chewing, and consult a vet if ingestion occurs.

What are the symptoms if a dog eats male fern?

Dryopteris filix-mas is not on the ASPCA non-toxic list. Its rhizome contains filicic acid (filixic acid / filicin) and thiaminase; ingestion has caused poisoning in cattle (GI distress and transient blindness), and the rhizome was historically used as a deworming drug. Not individually evaluated by the ASPCA for cats and dogs; treat as toxic, prevent chewing, and consult a vet if ingestion occurs. 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 dog has had access to male fern.

What should I do if my dog ate male fern?

Stay calm. Remove any plant from your dog'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 male fern toxic to cats too?

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

What is a dog-safe alternative to male fern?

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

Full male fern pet-safety