Is Shaggy Shield Fern toxic to cats?

Mildly. The ASPCA lists shaggy shield 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. Dryopteris cycadina is not individually listed on the ASPCA Toxic and Non-Toxic Plants database, and the genus Dryopteris is not covered, so it cannot be confirmed pet-safe. Treat with caution, as toxicity to cats and dogs is uncharacterised: keep out of reach and consult a vet if a pet ingests it, since some wild ferns affect grazing animals.

Dryopteris cycadina is not individually listed on the ASPCA Toxic and Non-Toxic Plants database, and the genus Dryopteris is not covered, so it cannot be confirmed pet-safe. Treat with caution, as toxicity to cats and dogs is uncharacterised: keep out of reach and consult a vet if a pet ingests it, since some wild ferns affect grazing animals. 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 shaggy shield 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.

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

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.