Is Rhubarb Toxic to Cats and Dogs?
Yes, rhubarb is toxic to cats and dogs. The American Society for the Prevention of Cruelty to Animals (ASPCA) includes rhubarb, also known as Pie Plant, on its list of plants that are toxic to cats, dogs, and horses.
The toxicity comes from soluble calcium oxalates found throughout the plant. If a pet consumes any part of the rhubarb plant, it can lead to serious health problems. Pet owners should understand the risks of having this plant in a home or garden accessible to animals.
Rhubarb: what the ASPCA database lists
| ASPCA entry | Rhubarb |
|---|---|
| Other common names | Pie Plant |
| Scientific name | Rheum rhabarbarium |
| Family | Polygonaceae |
| Toxic to | Toxic to Dogs, Toxic to Cats, Toxic to Horses |
| Non-toxic to | None listed |
| Toxic principles | Soluble calcium oxalates |
| Clinical signs listed | Kidney failure, tremors, salivation. |
What the ASPCA says about rhubarb
The ASPCA identifies the scientific name for rhubarb as Rheum rhabarbarium and notes it belongs to the Polygonaceae family. Its toxic properties are due to the presence of soluble calcium oxalates. These compounds are the reason the plant is hazardous to pets.
When a cat or dog ingests rhubarb, the ASPCA lists the following potential clinical signs:
- Salivation
- Tremors
- Kidney failure
These symptoms indicate a serious medical situation that requires immediate veterinary attention. The effects can be severe, highlighting the importance of preventing pets from eating the plant.
What this means for a home with pets
Having rhubarb in your yard or garden poses a risk to curious cats and dogs. Pets may chew on plants out of boredom, curiosity, or because they are exploring their environment. Even a small amount of a toxic plant can cause a reaction. Since the entire plant is considered toxic, any interaction a pet has with it, from nibbling on a leaf to digging up a root, is a cause for concern.
Supervision is key when pets are outdoors in areas where rhubarb grows. Many common garden plants can be harmful to animals, and it is safest to assume your pet may try to sample one. Always read ingredient labels on any human food you consider sharing, as rhubarb may be an ingredient in pies, jams, or other dishes. Offering a small piece of prepared food containing rhubarb is not a safe practice.
Keeping cats, dogs, and rhubarb plants apart
The most effective way to protect your pets is to prevent access to rhubarb plants. If you have rhubarb in your garden, consider fencing it off or using other physical barriers to create a pet-free zone. For indoor cats who have outdoor access, ensure their roaming areas are free of this and other toxic plants. When introducing any new plant to your home or garden, it is a good habit to first check if it is safe for pets.
Always keep pets securely away from the kitchen when you are preparing food with rhubarb. Dropped leaves or trimmings can be quickly eaten by a curious animal. Clean up any plant debris immediately. Proper storage and disposal of all parts of the plant are essential safety measures in a household with pets.
When to call your vet
If your pet chewed or ate part of this plant, call your veterinarian or an animal poison control line. Note which plant and which part, how much may be gone and when, and take a photo or a piece of the plant with you.
If you suspect your cat or dog has eaten any part of a rhubarb plant, contact your veterinarian or the ASPCA Animal Poison Control Center immediately. Be prepared to tell them what your pet ate, how much you think they consumed, and when it happened. Do not wait for symptoms to appear before seeking professional medical advice.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
Book an appointment soon
- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.