No, it's not recommended to feed pistachios to cats. While pistachios are not toxic to cats, they are high in fat and can be difficult for cats to digest. Consumption of pistachios can cause gastrointestinal upset, such as vomiting and diarrhea, in cats. Additionally, pistachios can also present a choking hazard or cause intestinal blockages in cats if they eat them whole or in large pieces. Therefore, it's best to avoid feeding your cat pistachios and instead stick to a nutritionally complete cat food recommended by a veterinarian to ensure that your cat's dietary needs are being met.