Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My dog ate Mountain Laurel - what should I do?
Kalmia latifolia
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
Excessive salivation, vomiting, diarrhea, weakness, difficulty breathing, paralysis, and potential heart failure.
Escalation note
This plant is considered highly toxic to dogs. Immediate veterinary intervention is required if any part of the plant is consumed.
What to watch for
Early: vomiting, profuse drooling, diarrhea, and weakness. Progressing signs: tremors, irregular heart rhythm, difficulty breathing, paralysis, or collapse.
Time window
Onset and duration are not given as specific numbers in the cited sources; clinical guidance treats grayanotoxin poisoning as time-critical.
When to call the vet
Call immediately — don't wait for symptoms to worsen. Grayanotoxin poisoning can progress to cardiac failure and death.
What this means for your dog
Mountain Laurel is highly toxic to dogs, who are more likely than cats to chew on landscape shrubs and ingest a meaningful amount. The plant's grayanotoxins disrupt heart and skeletal muscle, so any suspected ingestion should be treated as an emergency.
Sources: ASPCA, Pet Poison Helpline (no first-aid guidance).
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.