Pet safety
Is Crested Brackentoxic to cats & dogs?
Pteridium aquilinum 'Cristatum'
Toxic
Quick verdict — at a glance
- Toxic to cats?
- Yes — toxic
- Toxic to dogs?
- Yes — toxic
- ASPCA classification
- Toxic to pets · botanical name Pteridium aquilinum 'Cristatum'
Is crested bracken safe for cats and dogs?
No — crested bracken is toxic to cats and dogs. Keep it well away from any pet that chews plants; reactions can be significant. This classification follows the ASPCA Toxic and Non-Toxic Plant List, the most widely used reference for companion-animal plant safety in the US and the standard most UK vets cite as well. ASPCA lists Pteridium aquilinum (bracken fern) as toxic. The toxic principles are ptaquiloside (a norsesquiterpene glycoside, carcinogenic and causes bone-marrow aplasia) and thiaminase (destroys vitamin B1). Primarily documented in horses, cattle, and sheep; dogs can also be affected (neurological signs, bone-marrow suppression). Keep away from all pets and livestock.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | Yes | Toxic to pets |
| Dogs | Yes | Toxic to pets |
What happens if a pet eats crested bracken?
ASPCA lists Pteridium aquilinum (bracken fern) as toxic. The toxic principles are ptaquiloside (a norsesquiterpene glycoside, carcinogenic and causes bone-marrow aplasia) and thiaminase (destroys vitamin B1). Primarily documented in horses, cattle, and sheep; dogs can also be affected (neurological signs, bone-marrow suppression). Keep away from all pets and livestock. Signs usually appear soon after chewing rather than hours later. If you see drooling, pawing at the mouth, head-shaking, vomiting, loss of appetite, or unusual lethargy after your pet has had access to crested bracken, treat it as a suspected ingestion and act on the steps below.
What to do if your pet ate crested bracken
- Remove any plant material from your pet's mouth and move crested bracken out of reach.
- Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
- Do not induce vomiting unless a vet or poison-control specialist instructs you to.
- Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
- Bring a leaf or photo of crested bracken to the appointment so it can be treated correctly.
This page is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide rather than the plant. If you are worried, always contact a vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.
Pet-safe alternatives to crested bracken
Want the same look without the risk? These plants are listed as non-toxic to cats and dogs by the ASPCA and have similar care needs:
- Peperomia — non-toxic to cats and dogs (care guide)
- Cast iron plant — non-toxic to cats and dogs (care guide)
- Spider plant — non-toxic to cats and dogs (care guide)
- Ponytail palm — non-toxic to cats and dogs (care guide)
Crested Bracken and pets — frequently asked questions
Is crested bracken toxic to cats?
Crested Bracken (Pteridium aquilinum 'Cristatum') is toxic to cats according to the ASPCA. ASPCA lists Pteridium aquilinum (bracken fern) as toxic. The toxic principles are ptaquiloside (a norsesquiterpene glycoside, carcinogenic and causes bone-marrow aplasia) and thiaminase (destroys vitamin B1). Primarily documented in horses, cattle, and sheep; dogs can also be affected (neurological signs, bone-marrow suppression). Keep away from all pets and livestock. Keep it out of reach and contact your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 if your cat chews it.
Is crested bracken toxic to dogs?
Per the ASPCA, Crested Bracken (Pteridium aquilinum 'Cristatum') is toxic to dogs. Dogs often chew more enthusiastically than cats, so a toxic plant like crested bracken is best removed from the floor and low shelves entirely.
What happens if my pet eats crested bracken?
ASPCA lists Pteridium aquilinum (bracken fern) as toxic. The toxic principles are ptaquiloside (a norsesquiterpene glycoside, carcinogenic and causes bone-marrow aplasia) and thiaminase (destroys vitamin B1). Primarily documented in horses, cattle, and sheep; dogs can also be affected (neurological signs, bone-marrow suppression). Keep away from all pets and livestock. Signs usually appear soon after chewing rather than hours later. If you see drooling, pawing at the mouth, head-shaking, vomiting, loss of appetite, or unusual lethargy after your pet has had access to crested bracken, treat it as a suspected ingestion and act on the steps below.
What should I do if my cat or dog ate crested bracken?
Stay calm. Remove any remaining plant material from your pet's mouth and take the plant away so they cannot eat more. Note roughly how much was eaten and when. Do not make your pet vomit unless a vet or poison-control specialist tells you to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice. Bringing a photo or a leaf of crested bracken to the appointment helps the vet treat it correctly.
What are pet-safe alternatives to crested bracken?
If you want a similar look without the risk, good non-toxic swaps include peperomia, cast iron plant, spider plant, ponytail palm. All of these are listed as non-toxic to cats and dogs by the ASPCA, so they suit a home where pets have access to your plants.
Full crested bracken care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete crested bracken care guide, or browse the full pet-safe plant library to check another plant before you buy it.