Dock Toxic?

Updated 2026-03-06| 5 min read| 1,006 found this helpful

Rumex sp.

Dock (Rumex sp.) is confirmed toxic to cats, dogs, and horses, with soluble calcium oxalates as its core toxic principle.

Common clinical signs of exposure include salivation, tremors, and rare occurrences of kidney failure in dogs and cats.

Immediate veterinary consultation is recommended if any at-risk animal is confirmed to have ingested the plant.

FAQ

Is Dock toxic to Humans?

No targeted human toxicity data is available in this dataset; large ingestion may cause oral irritation, digestive upset, and potential kidney stress. (Low)

Is Dock toxic to Cats?

Salivation, tremors, rare risk of kidney failure (Moderate)

Is Dock toxic to Dogs?

Salivation, tremors, rare risk of kidney failure (Moderate)

Is Dock toxic to Horses?

Salivation, tremors, potential kidney damage (Moderate)

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Toxicity Details

Humans

Low

No targeted human toxicity data is available in this dataset; large ingestion may cause oral irritation, digestive upset, and potential kidney stress.

Cats

Moderate

Salivation, tremors, rare risk of kidney failure

Dogs

Moderate

Salivation, tremors, rare risk of kidney failure

Horses

Moderate

Salivation, tremors, potential kidney damage

Toxicity Snapshot

Toxic PartsAll plant parts (leaves, stems, roots) contain toxic concentrations of soluble calcium oxalates, with higher levels in mature leaves and roots.

Exposure RoutePrimary exposure route is ingestion; skin contact may cause mild transient irritation in sensitive individuals.

Toxic CompoundsSoluble calcium oxalates

First Aid & Prevention

First 30 Minutes

• Remove any remaining plant material from the exposed animal's mouth immediately.
• Rinse the oral cavity thoroughly with cool, clean water to reduce oxalate-related irritation.
• Avoid inducing vomiting unless explicitly directed to do so by a licensed veterinarian.

Contact Vet Immediately

• Confirmed ingestion of any quantity of Rumex sp. by cats, dogs, or horses.
• Observation of clinical signs including salivation, tremors, or lethargy after potential exposure.
• Suspected large-volume ingestion even if no immediate symptoms are visible.

Prevention

• Eradicate dock and sorrel plants from yards, pastures, and areas accessible to pets and horses.
• Train animal caregivers to identify the plant to prevent accidental feeding or exposure.
• Ensure forage supplied to horses and livestock is free of dock/sorrel contamination.

Treatment & Prognosis

• Administer intravenous fluid therapy as prescribed to support kidney function and reduce oxalate accumulation.
• Provide symptomatic care for tremors, oral irritation, and other presenting clinical signs.
• Monitor kidney function via blood work and urinalysis for 24 to 72 hours post-exposure.

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Professional Toxicology

Scientific NameRumex sp.

AliasesSorrel

Toxicity Grade

HumansLow

CatsModerate

DogsModerate

HorsesModerate

Target Organs

KidneysOral mucosaNeuromuscular system

Mechanism of Action

• Soluble calcium oxalates bind to systemic calcium after ingestion, accumulate in renal tubules to cause potential kidney damage, and trigger neuromuscular effects like tremors.

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Moderate toxicity; large ingestion may cause oxalate poisoning, salivation, tremors, and kidney damage.

Sheep: Low to Moderate toxicity; sheep typically avoid the plant, but high exposure can lead to adverse effects.

Goats: Low toxicity; goats have higher oxalate tolerance, but large intake may still cause digestive upset and kidney stress.

Confusion Risk

The following plants look similar and may be confused:

Common Yellow Woodsorrel Oxalis stricta

Both are common wild broadleaf plants; woodsorrel has distinct heart-shaped trifoliate leaves and yellow flowers, while dock has elongated wavy-edged leaves and tall brownish flower spikes.

Lamb's Quarters Chenopodium album

Both are widespread wild lookalikes; lamb's quarters has a white powdery coating on young leaf surfaces, while dock has glossy leaves and often reddish stem bases.

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Related Toxic Plants

Japanese Knotweed

Fallopia japonica

Moderate toxicity

Rhubarb

Rheum rhabarbarum

High toxicity (leaf tissue)

Wild Buckwheat

Fagopyrum tataricum

Low to Moderate toxicity

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Data Sources

1. ASPCA Animal Poison Control

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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