Can Dogs Eat Walnuts?

With limitsCall a vet within hours
Verdict for dogs: Caution · Evidence: M · Last verified: 2026-11-01 (seed data — veterinary review pending)

Only in small amounts, prepared the right way. Walnuts is not poisonous to dogs, but it has real downsides. It contains mold tremorgenic mycotoxins on walnuts and black walnut toxicity. Follow the limits below and watch for stomach upset.

Why only in moderation

mold tremorgenic mycotoxins on walnuts · black walnut toxicity

Which parts are the problem?

shellsmoldy nuts

Dose & exposure rules

Black walnuts are the most dangerous; moldy walnuts can cause tremors and seizures

If it must be on the menu: safe preparation

None recommended; one fresh kernel is unlikely to harm a large dog but the risk is not worth it

Symptoms to watch for

GI upsettremorsseizures (moldy nuts)

Hours

What to do now

Vet if black walnut or any moldy nut eaten

✔ Reviewed against ASPCA · AKC. Veterinary review pending — this page will carry a named, licensed veterinarian's sign-off after review (see team and editorial policy). General information only, not veterinary advice.

FAQ

How much walnuts can a dog eat?

Black walnuts are the most dangerous; moldy walnuts can cause tremors and seizures

What are the signs of walnuts problems in dogs?

Watch for: GI upset; tremors; seizures (moldy nuts). Hours

What should I do if my dog ate walnuts?

Vet if black walnut or any moldy nut eaten

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