My dog ate black walnut (hulls / moldy nuts) — what should I do?
🚨 RED — Go to an emergency vet NOW
Moldy hulls carry tremorgenic mycotoxins.
What to do now
- Call an emergency vet or animal poison control right now, even if your dog seems fine — signs can be delayed.
- Head to the nearest emergency vet; call ahead on the way.
- Remove any remaining material and keep packaging/labels — the vet will want product names and amounts.
- Do not induce vomiting unless a vet or poison-control expert tells you to.
- Note the time it was eaten, roughly how much, and your dog's weight.
Why it's a problem
Moldy hulls carry tremorgenic mycotoxins.
Symptoms to watch for
Vomiting, tremors, seizures.
When: Hours
Frequently asked questions
Is black walnut (hulls / moldy nuts) dangerous for dogs?
Yes. Moldy hulls carry tremorgenic mycotoxins. Treat it as an emergency and contact an emergency vet or animal poison control immediately.
What are the symptoms if my dog ate black walnut (hulls / moldy nuts)?
Vomiting, tremors, seizures.
How soon do symptoms appear after a dog eats black walnut (hulls / moldy nuts)?
Hours
What should I do if my dog ate black walnut (hulls / moldy nuts)?
Call an emergency vet or animal poison control right now, even if your dog seems fine — signs can be delayed. Head to the nearest emergency vet; call ahead on the way.
Who can I call for help?
ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855) 764-7661, both 24/7 (fees may apply), or your nearest emergency vet.
Dose guidance
No reliable dog-specific threshold is published for home use, so any amount should be discussed with your vet or a poison hotline.
Sources
- ASPCA Toxic & Non-Toxic Plants: black walnut
- Merck Veterinary Manual: Tremorgenic mycotoxins (moldy food)
Last verified against these sources: 2026-10-13. Where sources disagree, PawPanic uses the more conservative guidance.
Also known as: walnut hulls · Category: Plant · Last reviewed 2026-10-14