PawAI LabPawAI LabTry it Free

Is Rhubarb Toxic to Cats? Safety Verdict and What to Do

PawAI Lab
4 min read

Learn whether rhubarb poses a toxicity risk to cats, what signs may appear after exposure, and what immediate steps to take if your cat may have been exposed.

Quick Answer

Yes, rhubarb is toxic to cats. Rhubarb leaves are the most toxic part. Cats with garden access may encounter rhubarb plants. If your cat may have been exposed, contact a veterinarian or animal poison-control service right away, even if no signs are visible yet.

Before using any tool, contact a veterinary professional if your cat may have been exposed.

  • US: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • UK: Animal PoisonLine (01202 509000) or your nearest veterinary emergency clinic
  • Canada: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • AU: Animal Emergency Centre or your regular vet
  • EU: Contact your nearest veterinary emergency service

TOXICITY CHECKER

Check whether a substance may be harmful to your pet and get prioritized safety steps.

Check Toxicity

This tool provides general safety information and does not replace veterinary advice in an emergency.

Safety Verdict

Toxic. Rhubarb leaves contain soluble oxalates that bind calcium, potentially causing kidney damage and electrolyte imbalances. The leaves are toxic; the stalks are less dangerous but still not recommended.

Rhubarb leaves are the most toxic part. Cats with garden access may encounter rhubarb plants.

What It Is

Rhubarb leaves contain soluble oxalates that bind calcium and can cause kidney damage. The stalks contain much less but are still not recommended for cats.

Why It May Be Harmful

The toxic principle in rhubarb is soluble oxalates (potassium oxalate). Rhubarb leaves contain soluble oxalates that bind calcium, potentially causing kidney damage and electrolyte imbalances. The leaves are toxic; the stalks are less dangerous but still not recommended.

Signs of toxicity may include:

  • Drooling
  • Vomiting
  • Diarrhea
  • Tremors
  • Weakness
  • Kidney issues in severe cases
  • Loss of appetite

Timeline: Signs typically develop within a few hours.

Can be moderate to severe with large amounts of leaves.

What to Do If Your Cat Eats It

  1. Contact a veterinarian or animal poison-control service for guidance.
  2. Remove any remaining substance from your cat's reach.
  3. Offer fresh water if your cat is willing to drink.
  4. Monitor for signs and contact a veterinarian if they develop or worsen.

Information to have ready when you call:

  • Your cat's age, approximate weight, and any health conditions
  • The name or type of rhubarb and the estimated amount consumed
  • When the exposure likely occurred
  • Any current symptoms your cat is showing
  • The product packaging or a photo of the plant if applicable

If only a small amount of stalk was consumed, monitoring may be appropriate after consulting a veterinarian.

When to Contact a Veterinarian

Contact a veterinarian or animal poison-control service immediately if your cat may have been exposed to rhubarb. Do not wait for symptoms to develop.

Emergency signs that require urgent veterinary attention:

  • Persistent vomiting
  • Tremors
  • Weakness or collapse
  • Signs of kidney issues

Non-urgent follow-up: If only a small amount of stalk was consumed, monitoring may be appropriate after consulting a veterinarian.

FAQ

Which part of rhubarb is toxic?

The leaves contain high levels of soluble oxalates and are toxic. The stalks contain much less but are still not recommended for cats.

Can rhubarb cause kidney damage?

In significant amounts, soluble oxalates can bind calcium and potentially damage the kidneys. Large ingestions of leaves are most concerning.

How is rhubarb poisoning treated?

Treatment is supportive including IV fluids, monitoring of kidney values, and correction of electrolyte imbalances.

TOXICITY CHECKER

Concerned about another plant, food, medication, or household item around your cat? Get general, species-aware safety information to help you decide your next step.

Try Toxicity Checker

This tool provides general safety information and does not replace veterinary advice.

Sources

Disclaimer

This article and the PawAI Toxicity Checker tool provide general safety information and do not replace examination, diagnosis, or treatment by a licensed veterinarian. If your cat may have ingested a toxic substance, contact a veterinarian, emergency clinic, or animal poison control immediately.

Written by PawAI Lab