Are pistachios dangerous for dogs ? Yes, Both the raw and roasted pistachios includes a lot of fat. So eating pistachios everyday is not healthy for the dogs. It can cause upset stomach, gastrointestinal distress, obesity, and pancreatitis. Actually it is not toxic to dogs. But eating a food high in fat in large quantities will make complications for your pet including liver damage. Dogs digestive systems in not so sensitive to the proteins in nuts in simple terms. It you really want to give your dog pistachios or any other nut in cashew family, please make it an occasional food only.