Every dog is different. Individual allergies and sensitivities are common — always introduce new foods in small amounts and watch for adverse reactions. This site is for informational purposes only and is not veterinary advice. Always consult your vet.
The Full Picture
Plain, unsalted, shelled pistachios are not toxic to dogs, but they are not recommended. While not as dangerous as macadamia nuts or walnuts, pistachios are high in fat (which can cause pancreatitis), and the shells are a choking hazard and can cause intestinal blockage. Salted or flavoured pistachios add dangerous sodium levels. Pistachios can also develop aspergillus mould, which produces aflatoxin — a compound toxic to dogs. If your dog eats a few plain pistachios accidentally, they will likely be fine, but this should not become a habit.
What You Should Know
While pistachios is not outright toxic, there are important precautions to bear in mind before sharing it with your dog. Portion size matters, and certain preparations or varieties may be unsafe. If your dog has any existing health conditions, check with your vet first.