Can Dogs Eat Walnuts?
Why it’s a problem
Walnuts themselves are high in fat and easily cause stomach upset and pancreatitis. Worse, walnuts that sit on the ground grow molds that produce tremorgenic mycotoxins, which cause muscle tremors and seizures. Black walnuts are particularly dangerous.
How to serve it safely
Keep all walnuts, including baked goods containing them, away from dogs. Sweep up fallen nuts from the yard before dogs find them.
Warning signs to watch for
Vomiting, diarrhea, lethargy, muscle tremors, seizures and elevated temperature — tremors typically start within hours of eating moldy nuts.
When to call the vet
If your dog eats walnuts and starts trembling or seizing, that is an emergency — go to a vet immediately.
Common questions
Is one walnut dangerous?
A single fresh walnut will likely only cause mild stomach upset, but you cannot tell by looking whether it is moldy — treat any amount as a reason to watch closely.
What about black walnut trees in the yard?
Fallen black walnuts are a real hazard. Keep dogs away during drop season and collect them promptly.
More foods for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away.