Is Black walnut safe for dogs and cats?
Ask your vet about your own pet. This page is general information from the sources below.
ASPCA reports Black walnut (Juglans nigra): listed as toxic to dogs and non-toxic to cats. In dogs, moldy nuts or hulls can cause tremors and seizures, and eating shavings can cause wobbly walking. The ASPCA lists black walnut as toxic to dogs but non-toxic to cats. The dog worry is moldy nuts and hulls, and shavings. If a pet chews it, call your vet or a pet poison line.
Checked October 29, 2026.
Also called: no other common names listed. Juglans nigra.
What in it is the problem
Unknown, according to the ASPCA.
What it can do
In dogs, moldy nuts or hulls can cause tremors and seizures, and eating shavings can cause wobbly walking.
Good to know
The ASPCA lists black walnut as toxic to dogs but non-toxic to cats. The dog worry is moldy nuts and hulls, and shavings.
Did your pet chew it?
Call your vet or a pet poison line, and say what plant, how much and when. If you aren't sure which plant it was, take a photo of it.
Poison emergency? Call now
ASPCA Animal Poison Control: (888) 426-4435, 24 hours a day, every day. A consultation fee may apply.
Pet Poison Helpline: (855) 764-7661, 24/7. $99 per incident, follow-up calls included.
Or call your vet or the nearest emergency vet.
For the children
"Some plants can make pets sick, and lilies are very dangerous for cats. Ask a grown-up before you bring a plant or flowers inside."
A job: Be the plant checker. Help a grown-up look up each plant in the house on this site, and write the ones to keep away on a list.
This page is general information from the sources below, not veterinary advice. Common names are shared by different plants, so check the Latin name.
Sources
- ASPCA: Toxic and Non-toxic Plants: Black Walnut (checked October 29, 2026)