Cats & 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
Pet safety reference
Yellow Star Thistle
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
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
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.
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.
NC State Extension Plant Toolbox
botanical · 94% reliability
Centaurea solstitialis is an annual plant in the Asteraceae family, commonly known as yellow star thistle.
Questions about Yellow Star Thistle
Is Yellow Star Thistle safe for cats?
The safety of Yellow Star Thistle (Centaurea solstitialis) for cats is currently uncertain. The plant's classification is under review — the original safety label has been flagged as a likely labeler error and is pending curator verification, so a confident verdict cannot be given at this time.
What symptoms might a cat show after eating Yellow Star Thistle?
Specific symptoms for cats that have eaten Yellow Star Thistle are not documented in verified sources. The classification is actively under review following a provenance audit (May 2026), so symptom data cannot be reliably cited. If your cat has eaten this plant, watch for vomiting, lethargy, drooling, or loss of appetite and contact your vet.
What should I do if my cat ate Yellow Star Thistle?
Because Yellow Star Thistle's toxicity classification is currently unverified, treat the ingestion with caution: contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435 right away. Bring a sample or photo of the plant if possible to help the vet identify it accurately.
Why is Yellow Star Thistle's classification for cats listed as uncertain?
As of a May 2026 ASPCA provenance audit, the original classification for Yellow Star Thistle was flagged as a likely labeler error and is awaiting curator verification. Until that review is complete, neither a 'non-toxic' nor a 'toxic' label can be confirmed, and the plant should be kept out of reach of cats as a precaution.
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.
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