Can Dogs Eat Walnuts?

Walnuts are toxic to dogs, particularly black walnuts, which can carry Penicillium mould producing tremors and seizures. All walnuts pose risk. The toxin is a compound called juglone and mould-produced mycotoxins. Symptoms develop within hours of ingestion and include vomiting, trembling, weakness, seizures, and neurological signs. Even small amounts can be dangerous. Dogs may be attracted to walnut shells or fallen nuts in autumn when trees drop their fruit. Walnut trees in gardens are a risk; regularly check beneath them and remove fallen nuts. Walnut products like walnut oil are safer than whole nuts due to reduced toxin concentration, but avoidance is recommended. If your dog ingests walnuts, seek immediate veterinary attention.