What should I do if my cat ate French Sorrel?

Remove any remaining plant material and offer fresh water. Do not induce vomiting at home. Note the time and approximate amount ingested for the vet — soluble-oxalate cases need bloodwork and possibly IV fluids when the dose is more than minimal. Call if you saw your cat eat more than a single bite, if you notice tremors, weakness, or seizure-like behavior, or if any GI signs persist for more than a few hours. For a single small bite with brief, mild GI upset, monitor closely and call if anything changes.

French Sorrel — (c) Nuuuuuuuuuuul, some rights reserved (CC BY) — Photo by (c) Nuuuuuuuuuuul, some rights reserved (CC BY)iNaturalistCC BY

Photo by (c) Nuuuuuuuuuuul, some rights reserved (CC BY)iNaturalistCC BY

cat safety reference

Is French Sorrel safe for cats?

Q: Is French Sorrel safe for cats?

French Sorrel is potentially toxic to cats. The presence of soluble calcium oxalates can cause irritation to the mouth and digestive tract. Please contact your veterinarian if you suspect your cat has ingested this plant.

Rumex scutatus

French Sorrel is a perennial herb often grown for its tangy, edible leaves, but it contains soluble calcium oxalates that can be harmful to pets if ingested in quantity. It is characterized by its shield-shaped foliage and low-growing habit.

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Garden sorrelRumex scutatusShield-leaf sorrelSorrel

Light: Full sun to partial shade
Habit: Low-growing, clumping perennial
Care: Low

Safety status

Cats

Potentially toxic

Consulted references classify the plant as toxic or irritating for that pet type.

Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.

Sources

ASPCA Toxic Plant List

What this means for your cat

Cats: caution. French sorrel leaves contain soluble oxalates; small nibbles usually only cause mild GI upset, but unlike the calcium-oxalate houseplants the damage isn't local — it happens once the oxalate reaches the kidneys, which means a cat can eat it, look fine, and then deteriorate later.

What to watch for

After small exposures: drooling, vomiting, and loose stool that resolve on their own. After larger amounts: weakness, muscle twitching or tremors (from low blood calcium), abnormal urination, and lethargy in the day or two after ingestion — these signal kidney involvement.

Time window

GI signs may appear within a few hours of ingestion. The dangerous kidney-related signs (changes in urination, weakness, tremors) are delayed and can show up 24–36 hours after exposure, so the watch period is at least two days.

When to call the vet

Call if you saw your cat eat more than a single bite, if you notice tremors, weakness, or seizure-like behavior, or if any GI signs persist for more than a few hours. For a single small bite with brief, mild GI upset, monitor closely and call if anything changes.

First aid at home

Remove any remaining plant material and offer fresh water. Do not induce vomiting at home. Note the time and approximate amount ingested for the vet — soluble-oxalate cases need bloodwork and possibly IV fluids when the dose is more than minimal.

Sources: ASPCA, Pet Poison Helpline.

If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.

Cats — concern notes

Common signs

Oral irritation, excessive drooling, pawing at the mouth, difficulty swallowing, and potential vomiting.

Escalation note

The presence of soluble calcium oxalates can cause irritation to the mouth and digestive tract. Please contact your veterinarian if you suspect your cat has ingested this plant.

Safer alternatives

No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.

Source evidence

ASPCA Toxic Plant List

toxicology · 99% reliability

Open source

Sorrel (Rumex scutatus) is listed as toxic to both cats and dogs due to the presence of soluble calcium oxalates.

Plants of the World Online (Kew)

botanical · 95% reliability

Open source

Accepted botanical name and distribution data for Rumex scutatus L.

Cats & dogs page dogs page My cat ate French Sorrel

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