Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat 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, excessive drooling, weakness, and potential cardiac irregularities.
Escalation note
Ingestion of any part of the plant can be serious. Please contact your veterinarian or an animal poison control center immediately if you suspect your cat has consumed this plant.
What to watch for
Expect drooling, repeated vomiting, and diarrhoea first. Then watch for weakness or wobbly gait, a slow or irregular heartbeat, and depression. All parts of the plant are toxic — nectar, flowers, leaves, and stems are of greatest concern (Merck).
Time window
Per the Merck Veterinary Manual, clinical signs from grayanotoxin-containing plants typically develop within 1–4 hours of ingestion, occasionally as long as 12 hours.
When to call the vet
Call immediately. Any suspected ingestion of fetterbush by a cat is a vet visit, not a watch-and-wait — grayanotoxins can affect the heart, and cats are small enough that a few leaves can matter.
What this means for your cat
Cats: fetterbush is in the same Ericaceae family as rhododendron and mountain laurel, and it carries the same family poison — grayanotoxins. The Merck Veterinary Manual notes these compounds bind sodium channels and disturb nerve, muscle, and especially cardiac tissue, so even a small amount of chewed leaf in a cat is taken seriously.
Sources: ASPCA, Merck Veterinary Manual.
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.