Black Walnuts
DangerContain juglone and tremorgenic mycotoxins from mold. Cause severe neurological symptoms including seizures.
Quick Answer: Is Black Walnuts Toxic to Dogs or Cats?
Use this short answer first, then read symptoms and what to do next.
Is Black Walnuts toxic to dogs?
Yes. Treat Black Walnuts as an emergency risk for dogs. Call your veterinarian or a pet poison hotline right away after exposure.
Is Black Walnuts toxic to cats?
Yes. Treat Black Walnuts as an emergency risk for cats. Call your veterinarian or a pet poison hotline right away after exposure.
Symptoms to watch for
Vomiting, tremors, seizures, weakness, incoordination
What should I do now?
EMERGENCY. Contact vet immediately. Tremorgenic mycotoxin treatment needed.
Dogs
Emergency risk
Cats
Emergency risk
Risk level
Danger
Symptoms
Vomiting, tremors, seizures, weakness, incoordination
What to do now
EMERGENCY. Contact vet immediately. Tremorgenic mycotoxin treatment needed.
Explore Related Safety Hubs
Use these hub pages for broader dog, cat, cleaner, and emergency planning guidance.
Dog Toxicity Guide
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Open hubCat poisoningCat Toxicity Guide
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Open hubEmergency planningVet Cost Hub
Plan for emergency exams, toxin ingestion care, hospitalization, and insurance decisions.
Open hubSymptoms to Watch For
Vomiting, tremors, seizures, weakness, incoordination
What to Do
EMERGENCY. Contact vet immediately. Tremorgenic mycotoxin treatment needed.
Plan ahead for emergency vet bills
Poisoning, broken bones, and emergency surgery can get expensive quickly. Compare costs and accident coverage before you need it.
Pet Poisoning Emergency Checklist
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Clinical References
Quick Answers
Is Black Walnuts poisonous to dogs?
Is Black Walnuts toxic to cats?
What symptoms can Black Walnuts cause in pets?
What should I do if my pet ate Black Walnuts?
Related Items
Macadamia nuts are toxic to dogs. The exact mechanism is unknown, but they cause neurological and muscular issues.
Almonds are not toxic but can pose choking hazards and cause digestive issues.
Walnuts, especially moldy ones, can contain tremorgenic mycotoxins that cause seizures.
Contain juglone and can grow mold producing mycotoxins.
Safer than many nuts but high fat. Unsalted only.
Not toxic but high fat. Shells choking hazard.