Yellowrocket Toxic?

Updated 2026-03-06| 5 min read| 4,827 found this helpful

Yellowrocket is completely non-toxic to domestic cats and dogs, with no confirmed adverse effects from standard ingestion

The plant is toxic to horses, with ingestion linked to painful gastrointestinal symptoms including colic

Toxic effects are driven by naturally occurring isothiocyanate compounds present in the plant's tissues

FAQ

Is Yellowrocket toxic to Humans?

No confirmed human toxicity data available; may cause mild gastrointestinal irritation if consumed in very large quantities (Non-toxic)

Is Yellowrocket toxic to Cats?

No reported toxic symptoms, ingestion is not associated with adverse health effects (Non-toxic)

Is Yellowrocket toxic to Dogs?

No reported toxic symptoms, ingestion is not associated with adverse health effects (Non-toxic)

Is Yellowrocket toxic to Horses?

Gastrointestinal mucosal irritation, abdominal pain (colic), and occasional diarrhea following ingestion (Low)

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Toxicity Details

Humans

Non-toxic

No confirmed human toxicity data available; may cause mild gastrointestinal irritation if consumed in very large quantities

Cats

Non-toxic

No reported toxic symptoms, ingestion is not associated with adverse health effects

Dogs

Non-toxic

No reported toxic symptoms, ingestion is not associated with adverse health effects

Horses

Low

Gastrointestinal mucosal irritation, abdominal pain (colic), and occasional diarrhea following ingestion

Toxicity Snapshot

Toxic PartsAll above-ground plant parts (leaves, stems, flowers, seeds) contain toxic isothiocyanates

Exposure RouteIngestion of raw plant material is the only confirmed toxic exposure route

Toxic CompoundsIsothiocyanates

First Aid & Prevention

First 30 Minutes

• For horse ingestion: Immediately remove remaining plant material from the animal's access and mouth
• For cat/dog ingestion: Monitor for unusual gastrointestinal signs, no emergency action is required for small ingestions
• Document the volume of plant ingested and exposure time to share with a veterinarian if symptoms develop

Contact Vet Immediately

• A horse has ingested any quantity of yellowrocket, even if no symptoms are visible yet
• A horse displays signs of colic, abdominal discomfort, or reduced appetite after potential exposure
• A cat or dog displays persistent vomiting or diarrhea lasting longer than 2 hours after ingestion

Prevention

• Remove all yellowrocket growth from horse pastures and feeding areas to avoid accidental ingestion
• Store hay and livestock feed supplies away from areas where yellowrocket grows to prevent cross-contamination
• Train horse owners and handlers to identify the plant to avoid unintended exposure during grazing

Treatment & Prognosis

• For affected horses: Veterinary administration of gastrointestinal protectants and prescription pain relief for colic symptoms
• Supportive fluid therapy may be provided to prevent dehydration linked to gastrointestinal irritation
• Asymptomatic cats and dogs do not require any medical treatment post-ingestion

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Professional Toxicology

Scientific NameBarbarea vulgaris

AliasesWinter cress、Common barbarea、Rocketcress

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesLow

Target Organs

Gastrointestinal tract (stomach, small and large intestines)

Mechanism of Action

• Isothiocyanate compounds irritate the soft mucosal lining of the gastrointestinal tract, triggering inflammation, pain, and digestive dysfunction that presents as colic in horses

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Low potential toxicity, may cause mild gastrointestinal irritation if ingested in very large volumes

Sheep: No confirmed toxic effects reported, considered generally safe for consumption in small grazing quantities

Goats: No confirmed toxic effects reported, considered generally safe for consumption in small grazing quantities

Confusion Risk

The following plants look similar and may be confused:

Wild Mustard Sinapis arvensis

Both produce bright yellow 4-petaled flowers and grow in disturbed pastures; wild mustard has more sharply serrated leaves and smaller, hairier seed pods than yellowrocket

Common Ragwort Jacobaea vulgaris

Both have bright yellow flowering heads and grow in grazing areas; common ragwort has composite daisy-like flower clusters, while yellowrocket has distinct separate 4-petal flowers per bloom

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Related Toxic Plants

Black Mustard

Brassica nigra

Moderate toxicity, causes gastrointestinal irritation and hemolytic anemia in livestock with large ingestions

Rapeseed

Brassica napus

Low to moderate toxicity, causes pulmonary emphysema and digestive upset in grazing livestock

Tumble Mustard

Sisymbrium altissimum

Moderate toxicity, causes gastrointestinal irritation and kidney damage in horses and cattle

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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.