Dogs
UncertainIdentity or evidence quality is not strong enough for a firm answer.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Sources
dog safety reference
Is Yellow Star Thistle safe for dogs?
Centaurea solstitialis
Barnaby's Thistle is a hardy, spiny annual plant often found in open fields and meadows. While generally considered non-toxic, its fibrous nature can occasionally cause minor digestive discomfort if consumed in large quantities.
Centaurea solstitialisSt. Barnaby's ThistleYellow Star Thistle
- Light
- Full sun
- Habit
- Upright, branching annual
- Care
- Low
Safety status
What this means for your dog
Dogs are not the species at risk from Yellow Star Thistle — ASPCA's Barnaby's Thistle entry classifies Centaurea solstitialis as non-toxic to dogs. The plant's documented neurologic toxicity ("chewing disease") is specific to horses; for dogs the bigger practical concern is the spiny seed head pricking gums or paws rather than systemic poisoning.
Sources: ASPCA.
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.
Dogs — concern notes
Common signs
Under review — original classification flagged as a likely labeler error pending curator verification.
Escalation note
Under review — original classification flagged as a likely labeler error pending curator verification.
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
Barnaby's Thistle is listed as non-toxic to cats and dogs.
Questions about Yellow Star Thistle
Is Yellow Star Thistle toxic to dogs?
Yellow Star Thistle's safety classification for dogs is currently marked as uncertain and is under active curator review — the original classification was flagged as a likely labeling error during a provenance audit in May 2026. A definitive toxic or non-toxic verdict is not available at this time, so treat any ingestion with caution.
What symptoms would my dog show after eating Yellow Star Thistle?
Specific symptoms for Yellow Star Thistle ingestion in dogs are not documented — the symptom data was flagged as unreliable as part of the same classification review. If your dog has eaten this plant, watch for vomiting, lethargy, or loss of appetite and call your veterinarian.
What should I do if my dog ate Yellow Star Thistle?
Contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 promptly. Because this plant's toxicity status is uncertain and under active review, do not wait for symptoms before seeking guidance — err on the side of caution.
Why is Yellow Star Thistle's safety classification for dogs listed as uncertain?
A provenance audit conducted in May 2026 (source: ASPCA/provenance audit 2026-05-06) flagged the original toxic/non-toxic determination as a likely labeler error, meaning the record may not accurately reflect the plant's true risk profile. The classification is pending curator verification, so no confirmed severity level or symptom list is currently available.
Same dog verdict
Related plants for dogs
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Clintonia borealis
Clintonia borealis is a woodland perennial known for its glossy leaves and striking blue berries. While generally considered safe for pets, it is not intended for consumption.
Uncertain for cats & dogs.
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Dichelostemma pulchellum
Dichelostemma pulchellum is a cormous perennial wildflower native to western North America, known for its clusters of violet-blue, tubular flowers. It is considered non-toxic to pets, though its fibrous nature may cause minor digestive discomfort if consumed in large quantities.
Uncertain for cats & dogs.
Creeping Rubus
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Uncertain for cats & dogs.
Dichelostemma
Dichelostemma species
Dichelostemma is a genus of flowering corms in the asparagus family known for their unique, tubular, cluster-forming blooms. They are considered non-toxic to pets, though their fibrous nature may cause minor digestive discomfort if consumed in large quantities.
Uncertain for cats & dogs.