Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My dog ate Greek Oregano - what should I do?
Origanum vulgare hirtum
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Vomiting, diarrhea, and potential gastrointestinal upset.
Escalation note
While generally mild, ingestion of large amounts can irritate the digestive tract. Consult your veterinarian if you observe persistent symptoms.
What to watch for
Mild vomiting and diarrhea are the most common signs. Larger ingestions may cause lethargy and decreased appetite; oregano essential oil exposure can cause more pronounced GI signs and ataxia.
Time window
ASPCA does not publish onset or duration; GI signs typically appear within hours and resolve within 24 hours with supportive care.
When to call the vet
Call your vet or ASPCA Poison Control (888-426-4435) if vomiting persists, you see blood in stool, or your dog ingested oregano essential oil. A few chewed leaves usually do not require a visit.
What this means for your dog
Dogs that snack on garden oregano usually only get mild GI upset from the carvacrol and thymol oils in the leaves. ASPCA lists oregano as toxic but the typical clinical course is unimpressive — the danger spike is concentrated essential oil, not the herb itself.
Sources: ASPCA, NC State Extension (no first-aid guidance).
Source references
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.