These nuts are very toxic for dogs, if your dog eats ONE nut it is recommended to call your vet. The most common sign is weakness, especially in the hind legs. Other symptoms include lethargy, diarrhea, vomiting, tremors and fever. Some cases are mild, showing only a few symptoms, and resolve themselves within a few days. However, there are serious cases involving constant shaking, high fever, and an inability to walk.