Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My dog ate Fetterbush - what should I do?
Lyonia spp.
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, abdominal pain, lethargy, and potential tremors or cardiac distress.
Escalation note
The grayanotoxins present in this plant can cause significant systemic distress. Seek immediate veterinary attention if ingestion is suspected.
What to watch for
Look for drooling, vomiting, and diarrhoea first, then weakness, tremors, abdominal pain, lethargy, and slow or irregular heartbeat. The Merck manual reports gastrointestinal, cardiovascular, and CNS abnormalities; nectar, flowers, leaves, and stems are of greatest concern, but all parts are toxic.
Time window
Per the Merck Veterinary Manual, signs from grayanotoxin-containing plants typically develop within 1–4 hours of ingestion, occasionally up to 12 hours after.
When to call the vet
Call immediately. Suspected fetterbush ingestion in a dog warrants an emergency vet visit or a call to ASPCA Poison Control / Pet Poison Helpline — the cardiac effects can outpace the GI signs.
What this means for your dog
Dogs: fetterbush is one of the grayanotoxin-bearing Ericaceae shrubs, alongside rhododendron, azalea, and mountain laurel. The Merck Veterinary Manual notes the toxin acts on sodium channels in nerve and cardiac muscle — a chewed branch is more than a stomach problem in a dog, it can affect the heart.
Sources: ASPCA, Merck Veterinary Manual.
Source references
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.