§ Toxic plants · Juglandaceae · Checked Oct 2026
Is walnuts toxic to dogs?
Yes. Walnuts (Juglans spp.) is toxic to dogs, according to the ASPCA Animal Poison Control Center. Plant Smart rates its effects Severe, level 3 of 4.
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§ 010 · Signs
What to watch for
Signs include tremors, seizures and wobbliness or poor coordination. Signs can start within hours; some take a day or more to show.
§ 020 · If it happened
What to do if your pet ate it
Call your vet or a pet poison hotline straight away, even if your pet seems fine: the ASPCA Animal Poison Control Center, (888) 426-4435, or Pet Poison Helpline, (855) 764-7661. Both are open 24 hours and charge a fee. Have the plant or a photo of it to hand, and don’t make your pet vomit unless a vet tells you to.
§ 030 · Same family
Other Juglandaceae plants toxic to pets
Walnuts belongs to the Juglandaceae family. ASPCA lists these relatives too.
§ 040 · Questions
Questions about walnuts and pets
Is walnuts toxic to cats?
ASPCA's list does not name walnuts as toxic to cats. That is not the same as safe: call a vet if your cat eats it and seems unwell.
Is walnuts toxic to dogs?
Yes. ASPCA lists walnuts as toxic to dogs.
What happens if my pet eats walnuts?
Signs include tremors, seizures and wobbliness or poor coordination. Plant Smart rates it Severe, level 3 of 4.
What should I do if my pet ate it?
Call your vet or a pet poison hotline right away, even before signs appear: the ASPCA Animal Poison Control Center at (888) 426-4435, or Pet Poison Helpline at (855) 764-7661. Both charge a fee. Have the plant, or a photo of it, to hand.